This is a great clip, even though it is edited, from the film Dead Birds 1963. Imagine if we were able to capture all the ancient battles from Rome and Greece. Mable some Aliens records it.
The battle sequences are made up of many shots taken during different battles and stitched together to give the appearance of temporal unity. The apparent continuity stems from the post-synchronized sound, and in fact all the sound in the film is post-synched. Heider, himself, admits in his book Ethnographic Film, that some of the battle films were edited out of sequence, intercut with scenes from the women at the salt pool, which was also taken at a different time.