 When the Axis tanks had been defeated, XXX Corps was to continue north-west to Tobruk and rendezvous with a break-out by the 70th Infantry Division garrison.If the Axis garrisons at the frontier tried to retreat, the New Zealanders and the rest of XIII Corps were to cut them off or closely pursue them if they escaped.To protect the western flank of XIII Corps, the 4th Armoured Brigade Group had been detached from XXX Corps but remained under command, ready to intervene in support of either corps.