By now, Eighth Army had broken through the Axis positions at the Second Battle of El Alamein and began its pursuit across Libya, AA units were leap-frogged forwards to cover the important objectives as they were taken. 1st AA Brigade and 51st (London) HAA Rgt moved up from Egypt to defend the captured port of Benghazi and the nearby airfields for the supporting fighters and bombers of the Desert Air Force. 89th HAA Regiment followed up on 21 January 1943 from an AA practice camp at Suez to relieve 51st (London) HAA Rgt in these positions on 29 January and remained there until the end of the North African Campaign in May 1943.