 Complete the following phrase:  In June 1942 the 18th Brigade, having been rushed over to North Africa from Mosul, and with only two days to prepare defensive positions, was overrun by Erwin Rommels tanks at Deir el Shein in front of the Ruweisat Ridge. In the process, however, they gained valuable time for the British Eighth Army to organise the defences for what was to be the 