Shortly after the outbreak of the
Second World War in September 1939, Grover, still commanding officer of the battalion, now serving as part of the
3rd Brigade of the
1st Division (Major General
The Hon. Harold Alexander) led it overseas to France, where it formed part of the
British Expeditionary Force (BEF). There was no immediate action and the battalion spent the first few months of its time in France digging defensive positions in expectation of a repeat of the
trench warfare of the First World War. From 18 to 28 December Grover took over as acting commander of the 3rd Brigade and soon afterwards was posted to the
5th Division (Major General
Harold Franklyn) as its
General Staff Officer Grade I (GSO1). During the battle Grover's division suffered many casualties, in May losing all three brigade commanders, but gaining the division's third
Victoria Cross of the war, belonging to Captain
John Randle of the 2nd Battalion,
Royal Norfolk Regiment. Despite being victorious in this battle, Grover was removed from command on 4 July 1944 by Lieutenant General
Montagu Stopford, the corps commander, who was unhappy with Grover's methods. His replacement as GOC of the 2nd Division was Major General
Cameron Nicholson. Grover accepted his dismissal stoically and went on to be Director of Army Welfare Services at the
War Office in 1944 before retiring from the army in 1948. ==Postwar==