 Complete the following phrase:  The British prepared a new defensive position at Mersa Matruh. 21st Panzer was used to sweep behind the British XIII Corps, where it engaged in an intense combat with the 2nd New Zealand Division at the Battle of Mersa Matruh. The British were defeated and fell back to a new line at El Alamein. In a series of battles fought in July 1942, the Eighth Army was able to stop the advance of the Afrika Korps at the 