A military, generally consisting of an Army, Navy, Air Force, and in certain countries the Marines and Coast Guard, are forces authorized to use lethal or deadly force and weapons to support the interests of the state and some or all of its citizens. The task of the military is usually defined as defense of the state, and its citizens, and the prosecution of war against another state. The military may also have additional sanctioned and non-sanctioned functions within a society, including, the promotion of a political agenda, protecting corporate economic interests, internal population control, construction, emergency services, social ceremonies, and guarding important areas. The military may also function as a discrete subculture within a larger civil society, through the development of separate infrastructures, which may include housing, schools, utilities, logistics, health and medical, law, food production, finance and banking. In broad usage, the terms “armed forces” and “military” are often treated synonymously, although in technical usage a distinction is sometimes made in which a country’s armed forces may include both its military and other paramilitary forces. Armed force is the use of armed forces to achieve political objectives.