The advance into Egypt started on 9 September; the plan was modified to work around the shortage of transport. A flanking move through the desert was cancelled and the 1st Libyan Division and the 2nd Libyan Division Pescatori were brought close to the coast road to act as the spearhead for the infantry divisions of XXIII Corps. The Maletti Group would operate as a flank guard. In essence, Berti was to use his artillery and tanks as escorts to his infantry as his force advanced through hostile territory. Following the Italian advance, the British planned a limited operation to push the Italians back. They had noted that the Italian defensive positions were dispersed with fortified camps separated by large distances which meant they could not provide mutual support. The attack Operation Compass, was originally planned as a five-day raid. On 9 December, the 2nd Libyan Division was located at Tummar. The attack commenced on Tummar at 13.50, after 7 Royal Tank Regiment had refuelled and re-armed and artillery had softened up the defences for an hour. A north-west approach was made and the tanks broke through the perimeter without too much difficulty and were followed twenty minutes later by the infantry. However, the defenders put up stronger opposition than at Nibeiwa but by 16.00 Tummar West was overrun, except for extreme north-east corner. The tanks shifted their point of attack to Tummar East, the greater part of which was captured by nightfall.
On 10 December, 16 Infantry Brigade was brought forward from the 4th Indian Division reserve and with elements of 11th Indian Brigade under command were sent forward in lorries to attack Sidi Barrani. Moving forward it was in position barring the south and south-western exits to Sidi Barrani by 13.30. At 16.00, supported by the whole of the division's artillery, the attack, again with the support of 7th RTR, went in. The town was captured by nightfall and the remains of the two Libyan Divisions and the 4th Blackshirt Division were trapped between 16th Infantry Brigade and Selby Force. By 15 December, Sollum and Halfya had been captured as well as Fort Capuzzo, while all Italian forces had been cleared from Egypt. The 2nd Libyan Division lost 26 officers and 1,327 men killed and 32 officers and 804 men wounded, with the survivors being taken prisoner.
