Different types of international systems enhance or weaken their bargaining position or leverage, encourage or discourage them from seeking the aid of other states, or isolate them from other states within the system. There are two different positions. The first is a situation in which the weak state can enjoy complete or almost complete freedom of maneuver and action and can freely align itself with any other country. The second is one in which the weak state is included within a clearly marked sphere of influence of a great or super power; therefore it has little or no freedom of action and cannot align itself with other countries. Freedom of maneuverability is important for the weak state in all types of international systems. There are three basic types of systems: the balance-of-power or multipolar system, the bipolar system, and the unit veto system.