What did Tom play after he got even with Sid?

War

Tom skirted the block, and came round into a muddy alley that led by the back of his aunt’s cow-stable. He presently got safely beyond the reach of capture and punishment, and hastened toward the public square of the village, where two “military” companies of boys had met for conflict, according to previous appointment. Tom was General of one of these armies, Joe Harper (a bosom friend) General of the other.