The color photo was invented in 1903 by the Lumiere brothers, and the French army was the only one taking color photos during the
course of the war.
The images are artful and interesting, but are they really authentic color photos from the First World War? Or are they tricked-up Kodachrome?
Hmm, according to the thread here it might be for real. Even if they’re colorized, they’re great images: as monochrome, they would be striking, but this is one case where color adds. The technical details are at the Institut-LumiÃ©re.