The American Military consists of five branches: the Army, Navy, Air Force, Marine Corps, and Coast Guard. It is responsible for defending the United States and its interests, both domestically and internationally. The military operates under the Department of Defense and is led by the President as the Commander-in-Chief. Members of the American military undergo rigorous training to prepare for various missions, including combat, humanitarian aid, and disaster response. The military also plays a significant role in international relations, participating in alliances such as NATO and engaging in peacekeeping operations around the world.