A Foreign Service Officer (FSO) is a commissioned member of the United States Foreign Service. As diplomats, Foreign Service Officers formulate and implement the foreign policy of the United States. FSOs spend most of their careers overseas as members of U.S. embassies, consulates, and other diplomatic missions, though some receive assignments to combatant command, Congress, and educational institutions such as the various U.S. War Colleges. Within the Foreign Service, they are also known as Generalists.