Artillerie-Selbstfahrlafetten M107 to M110A2 US Development and Variants, Technology, German Bundeswehr Service The mechanisation of heavy artillery was one of the key points of the US Army's modernisation measures after the Second World War. A whole series of self-propelled howitzers were developed to meet this requirement, but none of them were air-portable due to their weight. This led to the demand for a family of field guns and field howitzers that could be deployed on self-propelled mounts using a transport aircraft. This was the birth of the M107 (175mm field gun) and M110 (203mm field howitzer) self-propelled artillery carriers. While the M107 remained a single production batch, the M110 was first upgraded to the M110A1 and later to the impressive M110A2 and introduced worldwide.
