American forces refer to the military personnel and units of the United States, primarily organized under the U.S. Army, U.S. Navy, U.S. Air Force, U.S. Marine Corps, and U.S. Coast Guard. These branches work together to protect national interests, support international peacekeeping efforts, and respond to emergencies both domestically and abroad. The structure of American forces includes active-duty members, reservists, and National Guard units. They are trained to operate in various environments and situations, ranging from combat operations to humanitarian assistance. American forces also participate in joint exercises with allied nations to enhance cooperation and readiness.