The first phase of 'Crusader' lasted until January 1942, when General Erwin Rommel counter-attacked. Eighth Army fell back to the Gazala Line, which consisted of a chain of defensive 'boxes'Routledge, pp. 135–7. On 22 May 1942, 107 LAA Bty left 88th HAA Rgt and moved to join 4 AA Bde in Tobruk, where it was captured the following month, together with 282 HAA Bty.'List of units captured in Tobruk 21 June 1942', TNA file WO 201/690.
