 Complete the following phrase:  Rommel attacked the Gazala Line on 27 May, swinging round the two southern boxes. 2nd Armoured Bde, positioned behind the line, moved south and then attacked the German flank from the east, delivering some sharp blows. Over the following days it was involved in fierce tank battles in what became known as the Battle of the Cauldron. On 2 June the Luftwaffe began intense air attacks on the southernmost box at 