U.S. Marines with Weapons Company, 1st Battalion, 1st Marine Regiment, Marine Rotational Force – Darwin, provide security at Cultana Training Area, South Australia, Australia, July 1, 2016. The Marines moved to their first objective point during Exercise Hamel, a trilateral training exercise with Australian, New Zealand, and U.S. forces. (U.S. Marine Corps photo by Cpl. Mandaline Hatch/Released)

A US Army HMMWV in the Saudi desert during the build up to Operation Desert Storm. Following the Iraqi invasion of Kuwait, a million-strong force began to assemble to counter the Iraqi forces, and if necessary, remove them forcibly. The core of this army was provided by nearly 700,000 US military personnel.