Cossacks (1914-1918)

Cossacks. Russia / Soviet Union. Cossack daredevil horseback riding display. First a guy on horse charges out; carrying flag (unrecognisable); right behind him are two horses w/ riders holding up another man above and between them - which means they have to stay riding exactly lined up. The guy balancing on top is brandishing a sword as they all gallop across field. Next; a display of more riding talent - or else a game; contest; sport - in which a guy; riding a galloping horse; swings