For a rule of cool setting, there is way too little good artwork featuring armies fighting while waving banners around. Dumping the stuff I have
40k artwork: Banners and standards edition
Jose Green
Jonathan Clark
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Oliver Parker
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Jackson Miller
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Jace Nguyen
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Lincoln Hall
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Parker Reed
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Josiah Walker
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Easton Lewis
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Joshua Turner
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Jeremiah Roberts
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Daniel Gonzalez
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William James
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Ayden Collins
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Daniel Anderson
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Nathan Diaz
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Julian Long
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Joseph Butler
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Brandon Morgan
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Dylan Anderson
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Adrian Watson
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Jacob Long
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Dylan Morris
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David Martinez
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Brody Martin
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Austin Watson
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Carter Anderson
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Jose Jenkins
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Jason Adams
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Levi Harris
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Camden Allen
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Matthew Sanders
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Dominic Gray
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Juan Miller
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Jack Ramirez
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Mason Carter
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Noah Butler
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Thomas Davis
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Cameron Long
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Andrew Sullivan
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Austin Long
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Jacob Nguyen
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Ian Morales
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William Scott
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Chase Ortiz
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Matthew Bailey
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Jayden Hernandez
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Landon Parker
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Xavier Hill
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Carson Turner
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Caleb Richardson
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Ian Hill
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William Wright
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Blake Sullivan
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Ryder Mitchell
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Liam Evans
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Oliver Lopez
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Blake Lopez
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Owen Williams
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James Wright
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Jaxon Carter
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Samuel Lewis
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Adam Diaz
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Nolan Green
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Nathan Bell
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Mason Myers
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Mason Turner
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John Nelson
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Jacob Torres
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Charles Miller
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Lincoln Nguyen
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Evan Russell
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John Cook
I don't know why this made me laugh but it's given me a good chuckle.
David Murphy
End of dump
Henry Garcia
Good stuff mate
Jackson Collins
Bump
Adam Perez
Belial reporting! Sorry!