The Army Rangers and Navy Seals are both elite military units within the United States, with the Army Rangers being a part of the US Army and the Navy Seals being a part of the US Navy. The Army Rangers are trained for direct action combat, airborne operations, and secret quick-strike missions, and are known for their exceptional mental and physical toughness. They can perform missions in a variety of environments, including cities, jungles, and deserts. On the other hand, Navy Seals are used for highly covert missions and have a focus on maritime environments, but can also be employed in various terrains and special military missions. Both units undergo intense training and are highly competitive to join.