List of ships of the United States Army

Section 3062, Title 10, U.S. Code, states that the Army includes "land combat and service forces and such aviation and water transport as may be organic therein." Army water transport capabilities include operation of fixed port facilities, construction and emplacement of temporary ports, operation of a variety of logistics watercraft (including transport vessels, lighterage, harbor and ocean-capable tug boats), plus port clearance capabilities. During World War II, the U.S. Army operated about 127,800 watercraft of various types.

Source: Wikipedia — List of ships of the United States Army (CC BY-SA 4.0)