The event was the Primera D game between Claypole and Victoriano Arenas in the 'burbs of Buenos Aires. With home team Claypole winning 2-0 and Victoriano Arenas down to just seven players having already had four players sent off, a fight broke out between all members of both teams and the ref had no doubt in showing the red card and sending off all players involved. In total, 36 red cards were shown, which must be some kind of record.
Watch the fun in this 3 minute video, with the main rumble starting just after the 2 minute mark.