In the spring and summer of 1939, the Territorial Army was ordered to be doubled in size, in order to meet the threat of Nazi Germany. As a result, the 1st Battalion raised a duplicate unit, the 2nd Battalion which was assigned to the 46th (Highland) Infantry Brigade, 15th (Scottish) Infantry Division. With the division, the 2nd Battalion remained in the United Kingdom until it was sent overseas, to France, in June 1944. The battalion fought in the Battle of Normandy in Operation Epsom and the Second Battle of the Odon, followed by Operation Bluecoat and the subsequent Allied advance from Paris to the Rhine. The battalion later played a small part in Operation Market Garden, later taking part in Operation Veritable and crossing the Rhine in Operation Plunder, finally advancing into Germany in the Western Allied invasion of Germany. During Operation Epsom ""the 2nd Battalion, The Glasgow Highlanders lost 12 officers and sustained nearly 200 casualties, mainly around the hotly contested village of Cheux. Total strength of this battalion was approximately 35 officers and 786 other ranks; thus "one day's" losses amounted to 34% of their officers and nearly 25% of the entire rifle battalion.""