Royal Tournament at Olympia, London.
Note: seems to be rehearsal rather than actual event.
Military & athletic entertainment. Precision marching & synchronised athletic exercises. Gymnastics demonstrations in which groups of young men form symmetrical group poses; incorporating headstands; handstands; etc. - similar to cheer leading.
A sequence w/ soldiers wearing dark jackets and white trousers and forming various patterns - because of underexposure this is very dark. Group of young men in white shorts and T-shirts march about; doing exercises in formation (such as all doing toe-touches while standing in pattern forming 3 diamonds) & also forming letters (such as RAF).
Finally a lot of men in various military uniforms arrange themselves around and on a dome-like hill in the middle of the stadium; some lying against it as if killed in battle; while one man assumes victorious pose on top. Flags etc.