 In the second phase of the operation, the 17th Infantry Brigade exploited the breach made in the perimeter, and pressed south as far as a secondary line of defences known as the Switch Line. On the second day, the 16th Infantry Brigade captured the township of Bardia, cutting the fortress in two. Thousands of prisoners were taken, and the Italian garrison now held out only in the northern and southernmost parts of the fortress. On the third day, the 19th Infantry Brigade advanced south from Bardia, supported by artillery and the Matilda tanks, now reduced in number to just six. Its advance allowed the 17th Infantry Brigade to make progress as well, and the two brigades reduced the southern sector of the fortress. Meanwhile, the Italian garrisons in the north surrendered to the 16th Infantry Brigade and the Support Group of the British 7th Armoured Division outside the fortress. In all, some 36,000 Italian prisoners were taken.
