Complex sentence: About 2,000 years ago a similar game evolved between Roman legionaries entailing the tossing of stone objects as close as possible to other stone objects, which eventually evolved into Italian Bocce, or outdoor bowling.
Split into simpler sentences: About 2,000 years ago a similar game evolved between Roman legionaries, which entailed tossing stone objects as close as possible to other stone objects. This game became popular with Roman soldiers, and eventually evolved into Italian Bocce, or outdoor bowling.