Infantry Brigade as a second-line duplicate of the 1st London Infantry Brigade, and the 5th London Infantry Brigade as a second-line duplicate of the 2nd London Infantry Brigade. These newly formed brigades were assigned to the 2nd London Division, which became active on 24 August 1939 and was assigned to Eastern Command. Command of the 2nd London was given to Major-General Harry Willans, who had previously commanded the 2nd London Infantry Brigade. On formation, the 4th London Brigade consisted of the 11th and 12th Battalions, Royal Fusiliers, and the 2nd Battalion, London Irish Rifles (Royal Ulster Rifles). The 5th London Brigade was made up of the 2nd Battalion, Queen's Westminsters (King's Royal Rifle Corps), the 2nd Battalion, London Scottish (Gordon Highlanders), and the 2nd Battalion, London Rifle Brigade (Rifle Brigade). To denote the division's association with London, the formation insignia represented the bells of St Mary-le-Bow church. The division was formed as a motor division, one of five such divisions in the British Army. British military doctrine development during the inter-war period resulted in three types of division by the end of the 1930s; the infantry division, the mobile division (later called the armoured division), and the motor division. Historian David French wrote, "the main role of the infantry ... was to break into the enemy's defensive position". This would then be exploited by the mobile division, followed by the motor divisions that would "carry out the rapid consolidation of the ground captured by the mobile divisions", therefore "transform[ing] the 'break-in' into a 'break-through'." According to French, the motor division "matched that of the German army's motorized and light divisions. But there the similarities ended." The German motorised divisions contained three brigades and were as fully equipped as a regular infantry division; while their smaller, light divisions contained a tank battalion. The British motor division was fully motorised and capable of transporting all of their infantry. However, it was "otherwise much weaker than normal infantry divisions", or their German counterparts. This was due to it being made-up of only two brigades instead of three, having two artillery regiments as opposed to an infantry division's three, and due it having no tanks. Home defence It was planned that the TA divisions would be deployed intact to reinforce the British Expeditionary Force (BEF) in France as equipment became available, and that all 26 TA divisions would be deployed by the end of