Born on 3 June 1924 in Sheffield, Yorkshire, England, Michael Gow was educated at Winchester College. Although his family lacked a military background, during the Second World War Gow volunteered for the British Army and enlisted into the Scots Guards in 1942. While at Caterham Barracks, the Scots Guards regimental depot, he was informed by his drill sergeant that he resembled a bag of manure tied up with pink string. However, he was soon commissioned as a second lieutenant on 5 June 1943, shortly after his nineteenth birthday. He served with the regiment's 3rd (Tank) Battalion, then part of the 6th Guards Tank Brigade. Serving in the campaign in Northwest Europe, including during the Battle of Normandy, Gow, after being injured in Belgium in October and taking six months to recover, was one of the first British officers into the Bergen-Belsen concentration camp in April 1945, shortly before Victory in Europe Day in May.