Armstrong remained in command until April 1942 when he was posted to command the 70th (Young Soldiers) Battalion. Lt Col H.A.B. Bruno took command in April 1942 and led the battalion in action in North Africa in March, but was killed in action during the attack on Djebel Djaffa in April. He was succeeded by Lt Col R O V Thompson, who had served with the 1st and 2nd Battalions before the war, appointed from a posting in the RAF to command the 1/6th for the final phase of the Tunisian Campaign. He subsequently led the battalion into action in Italy in the crossing of the River Rapido and the capture of Cassino. He, too was killed in action when his Jeep was blown up by a mine near Tivoli on 7 June 1944. Colonel C G S McAlester took command until February 1945. For the final months of the war, until August 1945, the battalion was led by Lt Col A G H Culverhouse, who had previously served with the 1/6th and had been wounded at Dunkirk.