A wargame is a game that simulates or represents a military operation. Wargaming is the hobby edicated to the play of such games, which can also be called conflict simulations. The somewhat similar, professional study of war is generally known as a military exercise or "war game," (note that wargamers have traditionally run the two words together, but the military, has generally kept them separate, it is not a hard and fast rule, however). Although there are occasional disagreements as to what qualifies as a wargame, the general consensus is that they are not only games about organized violent conflict or warfare, but that they must explore and illuminate or simulate some feature or aspect of human behaviour directly bearing on the conduct of war.