The regiment also raised the 6th and 7th battalions (both 2nd Line Territorial Army duplicates of the 4th and 5th Battalions) which were both in the 37th (Royal Sussex) Infantry Brigade, part of the 12th (Eastern) Infantry Division. They also served in France with the BEF in 1940 but suffered heavy casualties during the fighting and were evacuated from Dunkirk. The 12th Division was disbanded in July 1940 due to the heavy number of casualties suffered. The main reason for such heavy casualties was because most of the men had had very little training and few had even fired a rifle. After the return to England, the 6th Battalion served as a home defence unit for the rest of the war and was disbanded after the war in 1946. The 7th Battalion defended Amiens against air raids and the German 1st Panzer Division, which captured the town on 20 May. The battalion was transferred to the Royal Artillery and converted into the 109th Light Anti-Aircraft Regiment, Royal Artillery.