Hugh Trefusis Brassey joined in the Royal Scots Greys as second lieutenant, he took part  in the Normandy Landings in 1944 and the operation was planned from 1943.
He joined in the Royal Scots Greys as second lieutenant in 1935 During the Second World War, he was involved in the Syria-Lebanon Campaign in 1941 and the Battle of El Alamein in the following year. He took part in the Salerno Landings of 1943 and also in the Normandy Landings of 1944. Planning for the operation began in 1943. 
