The FSM is a sovereign, self-governing state in free association with the United States of America, which is wholly responsible for its defense. The Division of Maritime Surveillance operates a paramilitary Maritime Wing and a small Maritime Police Unit. The Compact of Free Association allows FSM citizens to join the U.S. military without having to obtain U.S. permanent residency or citizenship, allows for immigration and employment for Micronesians in the U.S., and establishes economic and technical aid programs.