Eighth Army Siege of Tobruk Operation Crusader El Agheila Cyrenaica Gazala
While he was away, the Eighth Army, having already relieved the Siege of Tobruk, had pursued Operation Crusader against Rommel's forces in Libya, successfully driving them back to a defensive position at El Agheila in Cyrenaica. On 21 January 1942, however, Rommel launched a surprise counter-attack which drove the Allies back to Gazala.
