High Quality Content by WIKIPEDIA articles! HMS Juno (F46) was a J class destroyer of the Royal Navy laid down by the Fairfield Shipbuilding and Engineering Company, Limited, at Govan in Scotland on 5 October 1937, launched on 8 December 1938 and commissioned on 25 August 1939. Juno participated in the Battle of Calabria in July 1940 and the Battle of Cape Matapan in March 1941. Juno was attacked by Italian CANT Z.1007 aircraft as she steamed with the Mediterranean Fleet against the German sea-borne invasion of Crete and sank south-east of Crete on 21 May 1941.