The Battle of Cape Matapan (Greek: Ναυμαχία του Ταίναρου) was a Second World War naval engagement fought from 27–29 March 1941. The cape is on the southwest coast of Greece's Peloponnesian peninsula. Acting on intercepted signals broken by the Government Code and Cypher School (GC&CS) at Bletchley Park, a force of British Royal Navy ships accompanied by several Royal Australian Navy vessels, under the command of British Admiral Andrew Cunningham, intercepted and sank or severely damaged several ships of the Italian Regia Marina under Admiral Angelo Iachino.