Japanese troops in combat, probably in the Sino-Japanese war.
Unused / unissued material - no paperwork - dates unclear or unknown
Good close shots of Japanese troops in trenches firing rifles and machine guns. Soldiers run forwards, following the Japanese Rising Sun flag. A few troops sit on top of a crashed plane.
A biplane flies overhead. Good shots of Japanese troops moving forwards. Troops wait as artillery fires in front of them. Good shots of Japanese artillery firing shells.
N.B. Presumably part of the Sino-Japanese war.