for 40,000 Italian casualties and prisoners, more than 400 guns, 130 tanks and hundreds of lorries. At dawn on 21 January, Australian infantry broke into Tobruk and made a path for 18 British I tanks. The Australians pressed on and captured half of the Tobruk defences by nightfall. The Australians took 25,000 prisoners, 208 guns and 87 tanks, for a loss of 355 Australian and 45 British troops. The 7th Armoured Division drove towards Derna and the Babini Group (BCS – under General Valentino Babini), with about 300 tanks, at Mechili. The BCS slipped away and from 26 to 28 January the British tanks bogged down in heavy rain; Derna was abandoned next day. The 7th Armoured Division sent Combeforce, a flying column, to Beda Fomm and cut off the 10th Army. Battle of Beda Fomm In late January, the British learned that the Italians were evacuating Cyrenaica along the Via Balbia from Benghazi. The 7th Armoured Division, under Major-General Sir Michael O'Moore Creagh, was dispatched to intercept the remnants of the 10th Army by cutting through the desert south of the Jebel Akhdar via Msus and Antelat, as the 6th Australian Division pursued the Italians along the coast road north of the Jebel Akhdar. The terrain was hard going for the British tanks and Combeforce (Lieutenant-Colonel John Combe), a flying column of wheeled vehicles, was sent on ahead. Late on 5 February, Combeforce arrived at the Via Balbia south of Benghazi and set up roadblocks near Sidi Saleh, about north of Ajedabia and south-west of Antelat. The forward elements of the 10th Army arrived thirty minutes later and found the Via Balbia blocked. The next day the Italians attacked to break through the roadblock and continued to attack into 7 February. With British reinforcements arriving and the Australians pressing down the road from Benghazi, the 10th Army surrendered. From Benghazi–Agedabia, the British took 25,000 prisoners, captured 107 tanks and 93 guns of the totals for Operation Compass of 133,298 men, 420 tanks and 845 guns. On 9 February, Churchill ordered the advance to stop and troops to be dispatched to Greece to take part in Operation Marita of the Greco-Italian War, since a German attack through Macedonia was thought imminent. The British were unable to continue beyond El Agheila anyway, because of vehicle breakdowns, exhaustion and the effect of the much longer supply line from the base in Egypt.