 Complete the following phrase:  Although Rommel had been ordered to simply hold the line, an armoured reconnaissance soon became a full-fledged offensive from El Agheila in March. In MarchApril, Allied forces were forced back and leading general officers captured. The Australian 9th Infantry Division fell back to the fortress port of Tobruk, and the remaining British and Commonwealth forces withdrew a further east to the LibyanEgyptian border. With 