The 75mm Pack Howitzer M1 (also known by its post-war designation M116) was designed in the United States in 1920s to meet a need for an artillery piece that could be moved across difficult terrain. The gun and carriage was designed so that it could be broken down into several pieces to be carried by pack animals. The gun saw combat in Second World War with the US Army (primarily used by airborne units), with US Marine Corps, and was also supplied to foreign forces.