By then, 15th LAA Rgt had joined 7th Armoured Division (the 'Desert Rats') on 2 August 1942. It was reinforced by 1 LAA Bty, a Regular Army unit that had fought in the Battle of France and subsequently served as an independent battery in 7th Support Group and in the Tobruk garrison. 15th LAA Regiment remained with 7th Armoured Division as its air defence component from the Second Battle of Alamein until the end of the war.