The Riot (The Riot) (1913)

When a girl delivering expensive garments loses them to some Irish shanty town kids,her boss, a Jewish clothier, is livid and a fight breaks out. Soon the mêlée spreads to the whole neighborhood with brick throwing merging into bomb throwing, with the sides on clearly ethnic lines. The Keystone cops find things too much for their efforts to stop it, so firemen and a bayonet-charging squad of soldiers are called into the fray.