The Tank, Infantry, Mk IV (A22) Churchill was a British heavy infantry tank used in the Second World War, best known for its heavy armor, large longitudinal chassis with all-around tracks with multiple bogies, its ability to climb steep slopes, and its use as the basis of many specialist vehicles. It was one of the heaviest Allied tanks of the war.
The origins of the Churchill's design lay in the expectation that war in Europe might well be fought in conditions similar to those of the First World War, and thus emphasized the ability to cross difficult ground. The Churchill was hurried into production in order to build up British defense's against a possible German invasion. The first vehicles had flaws that had to be overcome before the Churchill was accepted for wide use. After several versions had been built, a better-armored specification, the Mark VII, entered service with the British Army. The improved versions performed well in the later stages of the war.
The Churchill was used by British and other Commonwealth forces during the North African, Italian and North-West Europe campaigns. In addition, 344 Churchills were sent as military aid to the Soviet Union during the Second World War and more than 250 saw active service on the Eastern Front.
AVRE- Armored Vehicle Royal Engineers. A tank modified to be used by British Royal Engineers.
AVREs were armed with a Petard Mortar which fired a large projectile designed to destroy bunkers and other fortifications.
On the side of the AVRE were mounting points for the 3 ton Dozer blade. It would be fixed in place just above the fifth roadwheel, with hydraulics mounted over the second and third wheels that could raise and lower the blade. The blade was used to carve out hull-down positions for gun tanks, dig gun emplacements, flatten rough ground or create and fill anti-tank ditches. It could also be used aggressively to push barricades or debris and landmines from the path of attacking allies.