The division was meant to be equipped with 220 tanks. However, at the outbreak of the Second World War, in September 1939, the 'Mobile Force' only had 65. Most of the unit's troops had already been deployed for two years by 1940 and it took as long as three months for mail to arrive. On 16 February 1940, the Mobile Division, which had changed names during the middle of 1939 to be called the Armoured Division, became the 7th Armoured Division.