These photos from Bain are of early 20th century European wars - a couple from pre-World War I Balkan conflicts and some from the Great War itself.
Bulgarian giving water to dying Turk, Adrianople, 1912-13
Bulgarians? burying dead soldiers at Çatalca, Turkey
during the Balkan Wars, 1910-15
English prisoners of war working in fields near the
prisoner of war camp at Döberitz, Germany during World War I
German soldiers marching through the Serbian town of Paracin during World War I
Russian and Serbian prisoners in Serbia during World War I