British Armoured formations of World War II In April 1939, the Mobile Division was renamed the 1st Armoured Division and the Mobile Division (Egypt) was named the Armoured Division (Egypt) on the outbreak of war, before being renamed the 7th Armoured Division on 16 February 1940. Following the outbreak of war, the headquarters of the 2nd Armoured Division was activated on 15 December 1939. The first troops, however, were only attached to the division in the following month and then in part from forces released from the 1st Armoured Division following a divisional reorganisation. During 1940, a further three armoured divisions were formed; the 6th Armoured Division
11th Armoured Division (United Kingdom) later invaded Germany. It was disbanded in January 1946 and reformed towards the end of 1950. In 1956, it was converted into the 4th Infantry Division. During the German invasion of Poland in September 1939 and in operations against the Western Allies on the Western Front in May−June 1940, the German armoured formations demonstrated what some observers felt were dramatically improved new tactics, leaving the Allied forces with a perceived need to address these developments. The continued evolution of the Royal Armoured Corps was the answer for the British Army. The 11th Armoured Division was organized in March 1941, in