 Complete the following phrase:  Educated at the Royal Naval College, Dartmouth, Ewing joined the Royal Navy in 1923. He served in World War II was given command of the destroyer HMS Cattistock in 1940. As Captain of the destroyer HMS Offa, he took part in the Commando raid on Vågsøy in northern Norway in December 1941 during the Norwegian Campaign and then saw the disintegration of Convoy PQ 17 on its way to Russia as 23 of its 36 ships were lost in July 1942 during 