 Complete the following phrase:  On 1 December 1943, the division took on a new role and was again renamed. Now the 77th Holding Division, it was responsible for retraining the soldiers who had been on medical leave, former prisoners of war, repatriates, and anyone who did not meet the armys physical standards. Once the men were brought up to the standard, they were allocated to formations fighting overseas. Notably, the formation was used as a source of reinforcements for the 21st Army Group, which fought in 