The U.S. Army is the land warfare branch of the United States Armed Forces. It is responsible for protecting and defending the country, conducting military operations, and supporting national policies. The Army is made up of active-duty soldiers, reserve forces, and the National Guard, all working together to ensure national security. Founded in 1775, the U.S. Army has played a crucial role in many historical conflicts, including the American Revolutionary War, the Civil War, and both World Wars. Its mission includes training soldiers, maintaining equipment, and engaging in humanitarian efforts, both domestically and internationally.