WWII Anniversary of Battle of Cape Matapan Commemorative Signed Cover Autographed by Rear Admiral J Lee Barber and Vice Admiral Sir Donald Gibson - 28th March 1990. 5x7 inches The Battle of Cape Matapan was a naval battle during the Second World War between the Allies, represented by the navies of the United Kingdom and Australia, and the Royal Italian navy, from 27 to 29 March 1941. Cape Matapan is on the south-western coast of the Peloponnesian Peninsula of Greece.