Abstract: The strengthening of the Japanese-American union is the important driving force for the Japanese government to dispatch soldiers overseas.Beginning by dispatching the team of sweeping mines to the Persian Gulf,the mission of the oversea soldiers dispatched by the Japanese self-defence team expands from the participation in the peace-keeping field of UN at the beginning to involving in "the neighbor affairs".In order to support the American anti-horror war,the Japanese self-defence team's law of dispatching soldiers overseas becomes perfect and gradually forms the system.The Japanese-American military manoeuvres improve the Japanese self-defence team's fighting capability in the foreign countries.