Ships of the Royal Navy and Royal Australian Navy, intercepted and sank or severely damaged several ships of the Italian Regia Marina under Squadron-Vice-Admiral Angelo Iachino. The Battle of Cape Matapan fought from 27 to 29 March 1941.
The Yugoslav government was overthrown two days later (Tripartite Pact Signature) by nationalists. The Yugoslav coup d'état of 27 March 1941 in Belgrade, Kingdom of Yugoslavia, replaced the regency led by Prince Paul and installed King Peter II.