Michael Gambier-Parry, commander of the 2nd Armoured Division were captured. The Western Desert Force HQ took over under Lieutenant-General Noel Beresford-Peirse, who had been recalled from East Africa. Apart from an armoured brigade group of the 2nd Armoured Division, which had been withdrawn for the Greek campaign, the rest of the division had been destroyed. Several Axis attempts to seize Tobruk failed and the front line settled on the Egyptian border. Siege of Tobruk Tobruk was defended by a force of some 25,000 Eighth Army troops, well stocked with supplies and linked to Egypt by the Royal Navy. The garrison had armoured cars and captured Italian tanks, which could raid Axis supply convoys as they passed through Tobruk for the frontier, thus preventing the Axis from invading Egypt. Rommel attempted to take the port but the 9th Australian Division under General Leslie Morshead, resolutely defended the port. The Italians were slow to provide blueprints for the port's fortifications and several attacks were repulsed. After three weeks Rommel suspended the attacks and resumed the siege. Italian infantry divisions took up positions around the fortress while the bulk of the Afrika Korps maintained a mobile position south and east of the port. Operation Brevity Operation Brevity (15–16 May) was a limited offensive, to inflict attrition on Axis forces and secure positions for a general offensive towards Tobruk. The British attacked with a small tank-infantry force in three columns, Desert, Centre and Coast. Desert Column, with British cruiser tanks, was to advance inland and destroy tanks found en route to Sidi Aziz. Centre Column was to capture the top of the Halfaya Pass, Bir Wair and Musaid, then press on to Fort Capuzzo. Coast Column was to take Sollum and the foot of Halfaya Pass. Sollum, Halfaya Pass and Fort Capuzzo were captured but then the fort was lost to a counter-attack. A German counter-attack on 16 May threatened the force at the top of the pass and a retreat was ordered, covered by Desert Column. The Germans took Musaid back and a general British retreat began, to a line from Sidi Omar to Sidi Suleiman and Sollum, which left only the Halfaya Pass in British hands. Brevity failed to achieve most of its objectives and only briefly held the Halfaya Pass. The British lost 206 casualties. Five tanks were destroyed and 13 damaged. German casualties were 258 men, three tanks destroyed and