21. The concept became redundant when Cruiser tank armour increased anyway, rendering the infantry tank obsolete. 22. One of the best-known infantry tanks was the Matilda II of World War II. 23. Their infantry tanks were heavily armoured. 24. Work on the Churchill infantry tank had begun before the war began, with specification A20. 25. In practice both cruiser and infantry tanks entered the Second World War with the same gun. 26. The first purpose-designed infantry tanks were the QF 2 pounder anti-tank gun. 27. However, B Squadron 4th Royal Tank Regiment did include small number of Matilda II infantry tanks . 28. This included a slow infantry tank , armed with a small-caliber cannon and several machine guns. 29. In order to give them the required speed, cruiser designs sacrificed armour compared to the infantry tanks . 30. In early 1941 the 1st Tank Brigade was sent to Britain and equipped with the Matilda infantry tank .