 Complete the following phrase:  On 26 November the Commander-in-Chief Middle East Command, General Claude Auchinleck, replaced Cunningham with Major-General Neil Ritchie, following disagreements between Auchinleck and Cunningham. Despite achieving a number of tactical successes, Rommel was forced to concede Tobruk and was pushed back to El Agheila by the end of 1941. In February 1942 Rommel had regrouped his forces sufficiently to push the over-extended Eighth Army back to the Gazala line, just west of Tobruk. Both sides commenced a period of building their strength to launch new offensives but it was Rommel who took the initiative first, forcing the Eighth Army from the 