Background
The 155mm Gun Motor Carriage M40, to give it it’s proper name, mated the M1 155mm field gun with the proven chassis of the M4 Sherman with HVSS suspension, widening and lengthening the M4A3 Sherman chassis in the process. Built by the Pressed Steel Car Company, 311 vehicles were built to replace the M12 GMC in US service. One T83 (prototype of the M40) arrived in Europe in 1945 in time to see action in WW2. However, it was during the Korean War of 1950 – 53 that the M40 saw extensive combat operations. The only other user of the M40 was the British Army, which operated it under the name “M40 Cardinal”. The M40 fired a 95 pound shell to a range of 14 miles. It was operated by a crew of 8.