Marines are members of a military force trained for rapid and specialized combat operations. They often serve in the United States Marine Corps, which is a branch of the U.S. Armed Forces. Marines are known for their rigorous training, discipline, and ability to operate in various environments, including land, sea, and air. The primary role of marines is to secure and capture territory, support ground forces, and conduct amphibious assaults. They are equipped with a range of weapons and vehicles, and they often work closely with other military branches, such as the Army and Navy, to achieve their missions.