Modern military vs a single marine

a dude twice as large and 5 times as heavy as a large man infiltrating anything whatsoever

You know if we actually got invaded by marines I can see automatic grenade launchers becoming standard weapons for soldiers.

youtube.com/watch?v=oh9HUkU3WNQ

I honestly wonder if it'd be the vehicle mounted guns that'd do it though. Those are not rifle rounds they're shooting. We've got autocannons on our vehicles that can see at night, over vast distances and through walls and we know autocannons are marine-killers. They're also hardened against explosives, so bolters aren't necessarily gonna be a game-changer.

It'd be less "marine vs infantryman" and more "marine vs apc".

If we actually got invaded by marines they would nuke all the infrastructure from orbit and fry most of the electric equipment before just subjugating us.

Nukes are almost never used and are considered banned weapons of war, generally. There's bigger things for exterminatus and better things for non-exterminatus, since it poisons the planets its used on.

They'd definitely own the air and use conventional bombardment as they pleased, though.

Still, mobile forces are again the best answer to that. Spread out, decentralized and mobile enemies are hard to bombard, and more vulnerable to marines individual strengths.

Why would space marines invade holy tera?

Is it HFY if we win version Space marines?

I used ''nuked'' in the context of ''blown the fuck up''.
>Spread out, decentralized and mobile enemies are hard to bombard, and more vulnerable to marines individual strengths.
Exactly. Destroy the infrastructure, assassinate the leadership, kill all communication, then use your army's absurd advantages in strength, mobility and scouting to obliterate scattered enemy groups at your leisure. A legitimate Space Marine invasion would maybe last a week at best, with the other six days just being cleanup and subjugation.

Because clearly apostate warlords have taken over and forsaken The Emperor in lieu of their petty ambitions.

Followed by an Imperial Guard pressence with Imperial Navy orbiting the planet and finishing the subjugation after the Sector Governor comes down and randomly picks asshole # 12 that was lucky enough to avoid getting his brains blown out to be the new planetary governor

frags are actually shit against armor. Modern anti armor weaponry is actually pretty scary. But even if you count the marines magically hard armor at the end of the day even a marine can't argue with kinetic energy. A solid slug from a tank will still ragdoll him.

seriously people underestimate how good current tank armor and the weapons to kill them already are. Most of the non magical tech the imperium has is shit by todays standarts

They did it dozens of times during the great crusade, actually. They invaded lots of "Holy Terras". If they ran across us they'd just think of us as another false earth.

Partially true. The real issue is that once the Space Marines take signficant portions of the ground they can press the locals into armies and lead them competently. I don't think they'd do well trying that in the US or Europe or Asia, but a lot of the middle east, Africa and so on are easily vulnerable to conquest. They have people that can more or less equip them like guardsmen, and that's the real danger. With only a thousand Space Marines against nearly eight billion people they can't afford a lot of attrition. They're simply tough enough to tank hits when it's smart to do so - they're not invulnerable.

In the US they've got bombardment but they've also got the thread of being nuked by shitloads of missiles. Their ships are strong but they'd definitely lose just about any landing craft or aerial vehicles over the US. Space superiority trumps large formations and defensive emplacements but mobile vehicle armies are a part of modern warfare. The US, Russia, China, and Europe would be later targets. Though whether they'd obliterate cities depends on the chapter.

Far better for the marines to conquer say, Africa and hold that with orbital bombardment, then build up a guard army out of pressganged locals and operate as shock troops and in tactical strikes. They still retain the sky, and if they can start building more ships in Africa or wherever that orbital advantage will become absolute. But it'd be a generational challenge, not a quick one nor a guaranteed one. The real question is how much we'd advance in return. Ceramite-plated Orion spacecraft would be a fun start.

I think that's one of the main differences between chapters and legions. Chapters turn the tide the guard hold, whereas Legions WERE the tide.

Modern would get there asses handed to them, but we do need an Imperial Guard version of this guy.

en.wikipedia.org/wiki/Jack_Churchill

>Most of the non magical tech the imperium has is shit by todays standarts
A couple of numbers thrown out once upon a time by geeks who know anything about the military don't nullify decades of descriptions that say otherwise, user.

>In the US they've got bombardment but they've also got the thread of being nuked by shitloads of missiles.
Couldn't they just destroy the silos? Or, you know. Locating and destroying any significant military installation should be a piece of cake. Add scrambling any communication to that, and even semi-organized resistance is impossible. And don't even get me started on what would happen if The Guard happened to accompany them.

If it were that easy the US could just nuke North Korea's stockpiles. The answer is no - it's relatively fast to simply stick your nukes on mobile launchers and move them around. That's what the Norks and Russians do to counter the US - as in, "you can nuke our bases but we'll still have some survive and nuke you back".

The Space Marines couldn't fly over the US without having a lot of missiles headed their way tipped with nukes. They couldn't just bombard them out of existence immediately, either. Modern militaries are mobile and while being able to destroy any city or base via bombardment is a horrific advantage it's somewhat nullified by the fact that it'd be hard for them to hold position in orbit above the US long enough to pull it off. Between tons of advanced detection and radar systems, tracking systems, etc the US is just not something they'll brute force through. Unless they go straight for exterminatus immediately (and that's against their mandate to conquer and convert) then they'll find many modern states to be impossible to defeat.

It's much easier to just fall on some third world shithole, recruit the locals and give them lasguns and flak armor and 40k equipment and then send them to fight the worlds nations on the main battle line. That frees the marines to be shock troops when needed and to move around and strike soft-targets.

>to be impossible to defeat.
Addendum: defeat immediately.

The world has a better chance than you'd think. We're on the cusp of hitting dark age of technology levels and pumping out armies of Men of Iron.

youtube.com/watch?v=fRj34o4hN4I
youtube.com/watch?v=fUyU3lKzoio

In any long-term war they'd get heavy funding. We've already got plenty of drones, in a big war we'll put money into them and could potentially win any ground war by just never running out of troops. But the space advantage is pretty insurmountable. We could throw together weapons, maybe reverse-engineer some of the future materials, but I just can't see us taking on a Space Marine battlebarge with anything we could build in the near future. So long as they retain that they can just run away and chuck a meteor at us if things get too hard.

That's exactly what Macharius did when he met a planet that couldn't be conquered on the ground or bombarded from orbit. We have no real counter for anything coming at us at near lightspeed except being off the planet. They could obliterate any nation instantly.

But that's without them just giving up and trying to exterminatus us directly.

>We're on the cusp of hitting dark age of technology levels

You must be joking. Humans can't even reach the fucking Moon anymore. You are comparing us to a galaxy spanning empire.

>We've already got plenty of drones

That's a bad thing. China can hack our drones. Imagine what one techmarine do.

Probably nothing. He uses entirely foreign technology to ours and it's tough enough getting windows and linux to work together.

You also forget there's a difference between peacetime and wartime. In a full war-footing the modern world would quickly weaponize advanced science and create new weapons. We'd rebuild everything and move forward with the war because it's life or death. Nobody forgot how to do it, people just haven't made it a priority. But you've still got things like the BFR about to go up in a half dozen years or so. We have functional schematics for an Orion drive spaceship. We have bomb pumped lasers, nukes and so on. We're more advanced than we've ever been even if we haven't been walking on the moon. We did put an RV-sized science lab on Mars recently, after all. We are already running planes with lascannons on them, basically.

In an actual war the gloves come off and the priorities change. Cynicism doesn't change what we actually have today in the modern era. We aren't there yet, but we really are closer than you think.

This all assumes the far advanced 40k tech can't just easily hack/disable weapons and equipment. Which it can.

Hacking isn't a magic button, even for 40k. We aren't running on imperial or imperium derived computer systems or networks. The systems aren't just speaking different languages. They're utterly alien to each other.

If it did work both ways they'd get flooded with 40k memes anyway.

Even squads of jihadi tribesmen carry squad support weapons that would kill him, so the answer is one squad of jihadi tribesmen.

I'm sure an army's worth of tanks can land st least one lucky hit.

Or

>Probably nothing. He uses entirely foreign technology

You are joking. Techmarines use technology thousands of years more advanced than ours and is used to fighting against advanced aliens. Nothing is more foreign than alien. Pre space travel human computers would be child's play.

>We have functional schematics for an Orion drive spaceship

No "we" don't.

>Cynicism

I'll take my cynicism over your wishful thinking, any day of the week. Space Marines against 2018 Earth is overkill. The Imperial Guard would be a closer fight.

I mean if we are talking fucking anything probably an armoured platoon could kill him. 4 km range, gun is presumably at least equal to a krak missile. However comparing him to dismounted forces is more interesting. I think a lone space marine is probably a match for a dismounted infantry platoon at least, ATGMs could presumably kill him and maybe a designated marksman rifle round through the eye lense, but with the marine having superhuman speed, reflexes, and strength hitting him with any of those in a way that can bring him down would be difficult. Multiple platoons could likely bring him down though simply by luring him into a situation where someone with a LAW or ATGM can get a shot off at him.

Orion drive spaceships were fully designed and we tested the method. We could build one tomorrow if we wanted. We don't because they're essentially ships that make it into space by chain-exploding nukes and that's not healthy. In a time of true need we could bring them out. The Russians could build one as easily as the US, perhaps JASA could as well.

>You are joking. Techmarines use technology thousands of years more advanced than ours
No, they don't. They use systems that were developed by godlike AI that rebelled and were corrupted. Those systems were thousands of years more advanced than ours. Their systems are cobbled together from corrupted scrap and refined into functional systems. The Imperium is also technologically frozen and doesn't use AI. You can't take their power for granted, you have to show the specific ways in which they are superior and then make a case as to how that leads to victory.

I agree that the marines would win, but it'd be because of their battle-barges, not their l33t hacking skills or power on the ground.

>I'll take my cynicism over your wishful thinking, any day of the week. Space Marines against 2018 Earth is overkill. The Imperial Guard would be a closer fight.

It isn't wishful thinking. Look at both world wars and what happened to technology. People rapidly weaponized new scientific theories, weapons were mass-produced and the knowledge already exists. It's a matter of expanding it. The conflict simply isn't an instant crushing victory unless the space marines go straight for exterminatus and don't try conquering. If they did they'd ultimately win because of the advantage in space but not because they'd win on the ground or hack all the things.

>8 foot tall giant
>infiltrating society
I don't think you know how that works.

>spot any incoming threat well in advance and shoot/dodge most projectiles
They should probably put those abilities to more use in 40k.

incoming standard shaped charges and 40k autismpost I put in most of these threads: shaped charges are rare as hell in 40k, where AP technology ended with high speed and a hard cap. HE ammo for 40k autocannons is called out as lostech.

IRL, they're like peanut butter and chocolate. Shaped charges go with anything and everything. 40mm grenades, disposable rockets, recoilless rifles, big missiles, small missiles, mines, autocannon ammo, you name it.

So from a modern principles-based perspective, the SM is effectively running around with a fancy HMG. It shoots Raufoss with a fancy fuze. It's going to be scaled to the physical limits of a supersonic round with a hard tip. We know bolters can pierce SM armor, tho not necessarily well, so this in turn scales SM armor.

Shaped charges crush that level of AP performance. They're a completely different set of physics, an effectively liquid, technically solid Mach 27 needle of explosively forged metal. A bolter [with some arbitrary scaling up because muh future] is going to pierce maybe half an inch of modern RHA, no problem, at less than half a km.
40mm HEDP will blow through 3x that, 5-6x if it's the post-00s stuff.

So a SM can definitely run around and sneak around all night, aimbot 5 dudes at a time, or shrug off a lot of frag. But it only takes 1 lucky shot with a National Guardsman's launcher or Somali militiaman's RPG to put a big hole in him.

A lot of American nukes are on submarines for that very reason. It's hard to knock them out if you have no idea where they are.

They do. You get to see the 0,00000001% of times a marine actually dies, not the centuries he spent being a veritable god of war prior to that.

>surely this galactic Empire has no way of detecting things underwater

They fight with the Mk1 eyeball most of the time. I wouldn't get your hopes up.

Because of worries about the quantity of Soviet armor we would face in a cold war gone got scenario, the U.S. Army bought so many M72 LAW disposable anti armor rocket launchers that they are technically cheaper to issue than a regular hand grenade.

Their special forces in ground mission in specific stories do, sure.

>imperial guard conscripts
>special forces
>spaceship turrets
>special forces
>dogfighting pilots
>special forces
>space marines
>ok, this one counts

More like 99% of their guys 99% of the time. Beyond-eyeball ranges are mostly space combat or manually loaded artillery pieces.

>marines win
Is that really a spoiler?

“but stopped as weapons fire erupted from within. A noise like the birth of thunder filled the corridor as a heavy weapon roared. The sergeant jerked backwards as high-calibre rounds slammed into his armour, pitting the ceramite. His own shot went wide as a round clipped his gauntlet, the plasma blast scorching the ceiling. Barbelo dropped his chin and raised his shoulder as another torrent of rounds hammered him. Even as his pauldron cracked, the icon of the Chapter blasted from his shoulder in a shower of splintered ceramite, the sergeant took a step forward. Maion recognised the harsh bark of an autocannon as the traitors poured fire onto Barbelo – the sergeant’s armour would not hold. Maion lunged forward, tossed a frag grenade into the room, grabbed Barbelo’s gorget, and pulled him back into the corridor. ‘You dare!’ The sergeant snarled at Maion, back-fisting him across the helm. Maion staggered cursing. With disciplined restraint he quashed the rage boiling up inside him. ‘Calm yourself brother. To proceed would have been folly.’” Pg.12 H&B 15 – Beneath the Flesh

Auto Cannons, can hurt them, but the mostly just piss them off.

Also Space marines can run roughly 36mph, can smack bullets out of the air, a few thousand can clense a world a few weeks without orbital support.

A single marine could be kitted, but a whole chapter could 9/10 Earth.

>Orion drive spaceships were fully designed and we tested the method.

Absolutely wrong. There were no prototypes. You are confusing "designed and tested" with mere concept art in popular science magazines. All the art I see uses space shuttles, even though they were retired a decade ago.

>We could build one tomorrow if we wanted

Definitely wishful thinking. We can't even build a border wall tomorrow.

>You can't take their power for granted, you have to show the specific ways in which they are superior

I already did. An American drone was hacked by Iran. Your drones have no chance against a techmarine. The Pentagon gets hacked every year. Cyberwarfare is the Achilles heel of the military. You have no chance against an enemy that is technologically superior to you in every single way.

If a space marine can do those things, why didn't they in the passage you just posted?

That's an outlier, not the norm. If you'd like outliers in the other directions, I can think of marines killed with arrows, with spears, with daggers, and crushed under crowds.

Ever read Horus Rising? They invade an Earth which claims it is THE Earth of man, and that the marines come from a lost colony

>Beyond-eyeball ranges are mostly space combat
For sure they're gonna just roam the planet looking for all the weapons/infrastructure, none of that pesky space scanning.

> An American drone was hacked by Iran

Someone doesn't understand GPS spoofing in the old era, vs modern inertial bounding, differential GPS & directional antennas.

Next you're going to say the Taliban hacked drone video feeds because they were streamed to older ROVERs unencrypted.

Pic related, it's a automatic grenade launcher with motion-sensing radar sights.

Whoops, that's the HMG version. SM armor might survive the first couple hits, and they'll have to charge another 4 kilometers to hit the gunners with their sword.

>Absolutely wrong. There were no prototypes. You are confusing "designed and tested" with mere concept art in popular science magazines. All the art I see uses space shuttles, even though they were retired a decade ago.
No, we tested the methods and hashed out the math.

youtube.com/watch?v=Q8Sv5y6iHUM

We haven't built them but there are actual schematics for them. Again, we're not testing them full scale because it involves chain-exploding nuclear weapon in-atmosphere.

>Definitely wishful thinking. We can't even build a border wall tomorrow.
Your modern political slant has jack shit to do with Space Marines fighting all the armies of Earth. Those divisions get put aside when total war starts because it's a fight for annihilation and sovereignty and it's a matter for ALL nations, not just any one. You'd see Americans fighting next to North Koreans if Space Marines invaded. You'd see Russians NOT fucking with their neighbors for once. External threats unite people.

>I already did. An American drone was hacked by Iran. Your drones have no chance against a techmarine. The Pentagon gets hacked every year. Cyberwarfare is the Achilles heel of the military. You have no chance against an enemy that is technologically superior to you in every single way.

>I already did. An American drone was hacked by Iran. Your drones have no chance against a techmarine. The Pentagon gets hacked every year. Cyberwarfare is the Achilles heel of the military. You have no chance against an enemy that is technologically superior to you in every single way.
You did not. Iran is not the Imperium. The Imperium cannot be assumed to be in any way similar to Iran nor Iran similar to the Imperium. You have to show through fluff the actual capabilities of space marines and then make an argument based on your evidence. Otherwise your assessments have no attachment to reality and it becomes a game of, "my imaginary dick is bigger than yours."

Plague Marines shot at him. Those shots that Gammadin did not slap out of the air, he took against his shoulder plates. Shrapnel puffed against him.”

Blood Gorgons, p.159

Combat reflexes took over and Rafen drew his bolt pistol in a fraction of a second, his other hand snatching at the hilt of the battle knife resting in a sheath along the line of his spine. He fired a single shot at the High Chaplain, aiming low, aiming to wound, to slow him down. But he might well have called out his intentions in a shout. Astorath swept his blade aside and intercepted the bolt mid-flight with a crack of sound, the round blasting harmlessly into the dirt. Rafen dodged to one side as the weapon’s fast, fluid arc bisected the space where he had been standing, and he rolled, tumbling over red dirt and half-buried rocks.

-Hammer and Bolter. Redeemed Page 231-232

Gabriel squeezed a couple of shells out of his bolter and watched the little contrails that poured out behind them, as though in slow motion. They spun through the thick, gaseous air and then slipped through a gap in the lava flow, punching into the kaleidoscope of reflections beyond.
“The captain had no time to react – a blur of dark grey shoved her aside. Before she’d even blinked, Arvas was kicking and dangling above the ground, held aloft by Argel Tal’s fist around his throat. ” Pg.420 FTH

“‘Sire, I believe we should save them for–’ The human said nothing more. The front of his face came free with a sickly crack, the flesh and jagged bone crunching in the Night Lord’s fist. Talos ignored the body as it toppled, spilling the insides of its halved skull onto the decking. No one had even seen him move, such was the prophet’s speed, clearing ten metres and vaulting a console table in the time it took a human heart to beat once.” Pg.93

For many years afterwards, for the rest of her life, in fact, Perdet Suiton Antoni often wondered how none of them heard him coming. He was just there, suddenly. How could something that big move so fast and so silently, and appear without notice? Between the moment when the primuls began to spring and the moment when they would have fallen upon her, the giant appeared and interposed himself between her and the foul, pouncing creatures. It was almost as if he had stopped the flow of time and edited himself into that particular frame of it.
What followed lasted about three seconds.
The giant had his combat shield locked on his left arm and his short, heavy sword in his right fist. As he arrived, he was swinging the shield out, and smashed it flat into the nearest, leaping primul, shattering bones and deflecting the thing away. Wheeling, he hacked his sword clean through the neck and shoulder of the second, casting out a shower of dark red blood, and then ripped backwards low, cutting through the corpse's thighs even as it toppled, so that the whole mass of the primul folded into a collapsed heap. The third, coming in at the giant's left flank, held some kind of pistol weapon, an ugly, spiky device that spat hard, sharp bullets of buzzing metal. The giant turned, raising his left forearm upright from the elbow, and guarded his face with the combat shield in time to switch the buzzing projectiles away. They struck the shield with loud, angry cracks. One embedded itself there. Another bounced off and decapitated a nearby sapling. As the third bullet hit, the giant deftly tilted his arm very slightly, and ricocheted it off sideways straight into the face of the fourth primul. The creature's head split like a blood-fruit and the primul was savagely thumped backwards, off the ground, its legs wide. It landed, spread-eagled, on its back.

Brothers Of the Snake Page 62-65

Yea, because they totally don't have superior flanking and stealth (the armor cancels all noise and an Astartes is FAR more nimble then a human) capabilities, to say nothing of their aim. Also they can just dodge them, shoot them out of the air as they're charging you. Good look keeping your calm when a bunch of post-humans no selling everything you do is coming at you with the speed of a car.

Yeah but Horus wasn't an aggressor. He tried to reason with those assholes three times and they shot at him three times.

Now see, this man can source his evidence. Space marines are tough as hell and dangerous. But still they're not invincible.

>Auto Cannons, can hurt them, but the mostly just piss them off.

This is contradicted by your own passage. Autocannons can rip through their armor and to proceed into a volley of autocannon fire is considered folly. It is not, however, instantly lethal. The armor can take a few hits and they can survive a few hits through it. In other words any vehicle with an autocannon equivalent to those is a threat to a Space Marine, just not a guarantee of a kill.

The capabilities vary a bit but I prefer taking Space Marines in their more powerful incarnations. Still, they are not uniformly stealthy bullet-timers. There's too many contradictions in the fluff on that. Some are extraordinarily strong and can rip apart tanks, some are significantly weaker. Space Marines are not all created or equipped equally. Some are partially defective.

Even if you assumed they were all bullet-timing and had stealth armor and could tank autocannon hits all day they're still not invincible to modern forces at all. They're closer to vehicles in terms of the damage they can do and punishment they can take. But the point is that even if they win 9/10 engagements there's only a thousand of them and damn near eight billion of us. Even it takes IFV's and tanks to kill them we have more of all of those than they have marines. And it's not like bog-standard humans haven't killed Space Marines in the fluff before. I mean, Ciaphas Cain has killed two in one on one combat that I recall.

>the armor cancels all noise

You haven't read many SM books then (as twice-shown by this newer pasta) because in most, power armor is represented as noticeably louder than an unarmored man; and with an increased sensor signature.

I blame this new marine-wank on the Horus Heresy books. They didn't start it, but they made it ok.

>youtube.com/watch?v=Q8Sv5y6iHUM

That's your test? How small is that thing? The size of a VW Beetle?

>Those divisions get put aside
>External threats unite people

Wishful thinking yet again. I would want America to side with the Imperium.

>Iran is not the Imperium

It's so much worse.

>The Imperium cannot be assumed to be in any way similar to Iran nor Iran similar to the Imperium.

Wait a minute. Let me get that straight. I have to prove that a galaxy spanning empire, with starships miles long, is at least equal to Iran. Fucking Iran. That's what you call an argument.

>You have to show through fluff

I have to prove that a galactic empire can match the mighty Iran's IT department. But you don't have to prove that Earth can build a giant Orion nuclear bomb powered spaceship, because a VW Beetle size capsule flew ten feet into the air. You are completely laughable. I laugh at you.

Space Marines, in most incarnations, are simply an APC packed down to bipedal size, with the corresponding k/d ratio vs lightly armed primitives or humans caught at point blank.

>they can take multiple hits, like the multiple men carried in an APC
>they can stay awake, like multiple men in shifts in an APC
>they can go fast, like an APC
>they can run over, er, punch people like one
>they carry similar weapons
>they have basically the same armor

Tank shock is nothing new, tho; and modern first world troops have stronger willpower (they fight past the 60% casualties mark, unlike WW2 first worlders who broke around 35%) and weapons than the 1940s troops who coined the syndrome.

Marines will do great in urban combat, assumng they can fit in the right alleys, doors, tunnels and windows, but in open areas they're fodder for the average first world tank platoon.

>A broken, retarded, fundamentalist galactic empire that doesn't understand most of their tech.

Muh hax are not a 40k speciality; if that salts your buns, just assume we're saying gunships or fighter jets instead.

If a marine is worth 1k people (the propaganda version) it only takes 1 million to beat a chapter. China has more than that.
If it's 100, which is the assumed 'realistic' take, well, that's even less. Earth could probably do this with lucky stubber shots and pointy sticks alone.

In Space Hulk: Deathwing
Terminators die to genestealer hybrids armed with stubbers

>the armor cancels all noise

I highly doubt it'd cancel the sound of a 2,200 lb mini-hulk buster marching around, no less when he's running.

>That's your test? How small is that thing? The size of a VW Beetle?
It shows the science works. The research didn't disappear. It's like laughing at a scale test of a rocket engine.

>Wait a minute. Let me get that straight. I have to prove that a galaxy spanning empire, with starships miles long, is at least equal to Iran. Fucking Iran. That's what you call an argument.

You have to prove an empire working on entirely different technology with no understanding of ours can immediately hack our technology. It isn't magic - Iran did it because they run on the same sort of hardware, using similar software and did it on a limited scale. We hacked them and shut down their entire nuclear program because we made the systems they ran on.

The Imperium doesn't run Windows40k. Machine spirits are half-wild half-retarded AI systems and the Imperium runs on them. The Imperium are not notorious space-catholic hackers. And again - all the nations of the world would be involved, not just the Americans. By your logic the Iranians hacked the best military in the world, so of course they could hack the Imperium. It doesn't matter who can hack who if we're working on completely alien systems from one another. It's like trying to unscrew an allen-wrench screw with a phillips-head screwdriver. It doesn't work because they're not designed to work together! If you think it should use the fluff to show otherwise.

Space marines are awesome and tough and well beyond normal soldiers, but 40k factions are not uniformly strong. It's the fact that they're broken messes in spite of that advancement that make them so endearingly appealing.

>>doesn't understand most of their tech

If they can build it, then they understand it. Period.

Wrong. They explicitly don't understand how most of their stuff works. It was designed by godlike AI during a previous era along the lines of scientific principles too advanced for humans to understand. Then there was an AI rebellion where the AI were corrupted and they lost just about all of their scientific knowledge and understanding. They know how to make things and some techpriests do indeed understand a lot, but that knowledge is heavily hoarded and limited in scope. It's also incomplete and filled in with pointless mysticism as well as worthwhile mysticism.

They've lost their understanding of their stuff and there's no chance for them to ever regain it because they're forever on the defensive and under attack. They also pointedly hate high technology and see it as a dead end not worth exploring because the Men of Iron happened. That's the grimderp of 40k, it's why it's such a fun setting. They're space-barbarians in the ruins of utopia.

Autoguns kill Marines on the table top. Shoot enough bullets at the Marine, he'll die.

Anti-Armor weapons would put him down real quick too.

One sniper, I guess

>there's no chance for them to ever regain it
I dunno about that. The Vanquisher Cannon was re-invented twice by two separate forge worlds..

They do advance, sure. But during the DAOT they had continent sized battle-cities, endless robot and titan legions on every world and essentially dominated the galaxy. Baneblades would be considered light tanks to them. DAOT spaceships were even crazier. Now you've got the Primaris marines and weapon designs. It's not that they don't advance or have any knowledge, it's that they're never regaining that level of tech again and what they do make is often lost again after it's found or corrupted by chaos.

I never got the DAoT shit. How are the necrons beyond the DAoT, but still get whooped by guardsmen?

Yeah this question has been answered. One platoon of troops with armoured vehicles would kill him assuming they managed to corner him first.

A strike cruiser would secure earth's surrender just by threatening to start razing cities with total impunity. Many chapters would be perfectly happy to bomb us back to the stone age so they can unfurl a Mission Accomplished banner and move on to the next warzone. Maybe they'll come back in a hundred years to recruit the mad max wasteland survivors to be the next generation of marines.

If they actually wanted to conquer the world with their 100-200 dudes (assuming the battle company has other chapter elements attached to it), then it comes down to whether or not we can shoot down their flying transports and I'm assuming that we can't do that effectively. Marines are able to effectively operate against the Tau Empire (although not without a lot of difficulty), so we have to assume the tech level of thunderhawks and stormravens is way beyond what our missiles and fighters can counter.

A few dozen space marines jumping out of thunderhawks and wrecking shit several times a day for several weeks/months would probably wreck the earth's ability to sustain a high-tech (for us) military resistance.

Its a whole lot of dakka.

Sophisticated weapons can be stumped by the simplest of problems, and I suppose Necrons are no exception. There are always weakpoints which the one in a hundred lasbeam or autogun shot or grenade shrapnel will hit.

Its gotta overheat eventually

Advanced tech is still on tiers. Think of it like a 21st century infantryman going up against a musketman. Both could beat a Babylonian archer but there's a gap. Here's a tier for 40k.

1: The Old ones - super old, lovecraftian gods, basically. Could do as they pleased and reshape reality.
2: The Necrons - not as old, but damn near and advanced enough to challenge the old ones. Could kill stars when they needed to. Killed their own gods.
3: Slaan, Krorks and Pre-fall Eldar, made by the Old Ones, created gods that ate everything. Fought competitively with Necrons. Above humanity because they cheated with warp hax. The Jokero make stuff on this level, but they're retarded space-apes with no personal will.
4: Dark Age of Technology humanity. Essentially a giant space federation with godlike AI's and limitless robot legions but zero warp hax.
5: The Modern Eldar - lost most of their warp hax and supertech, but retains an edge on the Imperium. Doesn't always translate to victory in combat.
6: The Modern Imperium - not at DAOT levels, but has some warp hax of its own. Has a lot of tech but doesn't understand it - think of Saudi's with SUPER STRONK SOVIET T-45 ONLY SLIGHTLY OUTDATED TANK and you'd get the idea. The elites are extremely competent most of the time, though.
7: The Tau - more advanced than modern humans, but nowhere near catching up with the Imperium's better technology. They're a few centuries ahead of modern Earth with a small space empire and railgun rifles.
8: Tau Client Races - often multisystem less advanced races mind controlled into servitude. Still more than modern earth.
9: Modern Earth - We're on the cusp of making combat AI and we've got very good weapons tech, but no space capabilities or warp hax. No orbital defenses or colonies.
10: Barbarian worlds where tech has been forgotten and people like like olden medieval times, except sometimes they get giant robot knights or dress like Orks.

Use bigger bullets.

>galactic empire
>one space marine
You seem to have misunderstood the premise.

depends if it is closer to a tabletop marine or a bolterporn marine. I would say a squad of first world soldiers with the right weapons.

>I mean, Ciaphas Cain has killed two in one on one combat that I recall.
As far as I know he fought a severely wounded Chaos marine long enough for Jurgen to shoot him with a melta gun

TOW or Kornet?

Depend of the chapter, for example a flesh tearer would get destroyed in no time.
Out of all the chapters i think a raven guard or raptor would do it, mostly because they're trained in stealth and guerilla tactics. All he have to do is go to a powerful and unstable country, america would make a good target. Once he's there, he spread the word of the emperor and get some cultists, not hard within a christian state, then plot a bit and launch a rebellion : small arms aren't a problem, but he need to get to the good stuff.
This is probably the hardest part of the plan, assuming he didn't enlist some marines, he now have to take entire military bases, with a shitty militia for all support, so unless he get lucky (commander don't want to shoot on citizen, somehow infiltrate the base,etc) that's the end of the road
If he does it though, then it's peanuts, launch a full scale civil war knowing the state won't use nuclear weapons (agent orange don't have the balls) and once he overthrow the president(a matter of time for someone trained for hundred of years in every type of warfare) then bam, he got a first world country all to himself, and no one is going to raise so much as a finger against him
Last part of the plan is spreading the words, hoping to start rebellions in other lands
everything here is wishful thinking at best, and he'd need a lot of skills which aren't exactly found in a regular marine
Tl.dr a raven guard chaplain might do it, enphasis on might

Not just Marines, he sends squads of fucking Terminators in.

>agent orange don't have the balls

As if he wouldn't recognize the 21st century incarnation of the Emperor and pledge fealty.

Yes, thats why autoguns (described as equivalents to modern day rifles in 2nd edition) and lasguns are known to kill marines, in the tabletop, lore, video games

Get the fuck outta here!

friend, the tau tech is superior to anything the imperium uses that does not involve the warp. the only thing the imperium has on the tau are good void shields and warp travel, because both require you to know about the warp first.

>Couldn't they just destroy the silos?
Silos are built in the plains of Bumfuck Nowhere, South Dakota. There are no hills to reflect or focus a blastwave and they're spaced such that a useful hit on any one silo will have no impact on any other. Further, silos are capped with a steel door weighing in excess of 300 tons mounted on hydraulic systems capable of flinging it a football field, functionally impossible to destroy or obstruct with a single strike.

It's also impossible to nuke the same target twice in quick succession, since the dust and particulates hanging in the air after the explosion will sandblast the falling warhead at hypersonic speeds, promptly reducing it to scrap. A launch is comparatively sedate and can go on unimpeded.

Eh... not necessarily. A lot of ancient tech from the Dark Age of Technology is far more advanced than the Tau. They just don't use it too often thanks to how old they are.

Also Officio Assassinorum has assassins that can massacre entire armies.

well, anything the IoM can reliably replace that isnt warp based is worse. Thats more accurate.
A lot of the DaoT shit is increadibly underused, or misused. I mean Terminator armor is just misused mining equipment and imperial knights are supposed to be all purpose vehicles that can kill alien monsters but also help on a construction site for young colonies.

>We're on the cusp of hitting dark age of technology levels and pumping out armies of Men of Iron.

pffffffhahahahahahaha

I'm pretty sure he decapitated one with his sword.
Also marines being marines, having being wounded does not slow them down.

A platoon with anti tank weapons should be enough assuming they knew he was coming.

>Yes, thats why autoguns (described as equivalents to modern day rifles in 2nd edition) and lasguns are known to kill marines, in the tabletop, lore, video games
They only kill marines when the shooter gets lucky. Not to mention the probably of scoring a shot in a weak area goes up exponentially with each guardsman, further still when shooting full auto. And I imagine a trench focus firing a marine would get lucky quick.

Same principle for modern soldiers. Just keep shooting until it stops moving.

Single anti-tank missile, probably from a drone. As I recall ceramite is pretty much ceramics and titanium aka modern tank armor. Its good but nothing modern weaponry can't handle.

The Marine assault rifle has the equivalent in the modern military as a fully automatic grenade launcher on a tripod so while it is certainly excessive firepower, it is also well within bounds of what a modern military can expect. Sensors shouldn't be too far above many modern militaries and the marine should show up pretty clearly given he's got a massive nuclear reactor strapped to his back.

Only ocp might be the physical capabilities of the marine or more estoric tech like power fields and such.

Most space Marines are about 7'5 feet tall actually. And most basketball players are that if not taller.

What'll really make him stick out is how fucking swole he looks.

Go home spacebattles fagot.

Do you people expect a human with super reflexes and a master of tactics to sit in the middle of nowhere where he is an easy target for anti-tank weaponry?