The Cromwell VI CS (Close Support) was identical to Cromwell IV, but a low-velocity 94mm howitzer, which was designated 95mm to distinguish it from the weapon used in the older, the obsolete CS tanks, and was replaced the original gun of 75 mm to provide a close-support vehicle for the infantry. The Centaur IV were renamed later Cromwell Mark.VI. The precise number of Cromwells built is no longer known, but would appear to be about 341 was produced; in addition, many Centaurs were converted to Cromwells.
Named after the English Civil War-era military leader Oliver Cromwell, the Cromwell was the first tank put into service by the British to combine high speed from a powerful and reliable engine (the Rolls-Royce Meteor), and reasonable armour. The name "Cromwell" was initially applied to three vehicles during development. The Centaur tank was closely related to the Cromwell, both vehicles being externally similar. The Cromwell and Centaur tanks differed in the engine used; the Centaur had the 410 hp Liberty engine, the Cromwell had the significantly more powerful 600 hp Meteor; Centaur hulls were converted to Cromwells by changing the engine.
The Cromwell tank entered front-line service with the Allied invasion of Normandy in June 1944. Cromwells landed with the following forces on D+1. They saw extensive action with the British Army, forming part of the 6th Airborne Division, 7th Armoured Division, 11th Armoured Division, Guards Armoured Division, and 1st (Polish) Armoured Division.




















