 The battleship HMS "Prince of Wales" and the battlecruiser HMS "Repulse" with four destroyers forming the "Z" force landed in Singapore's Naval Base on 2 December 1941.Following the Pearl Harbor attack, the Japanese also bought Johore coastlines just opposite the Naval Base and attacked the two warships unexpectedly.The two warships sank on 10 December 1941, in whose memory a Sembawang Memorial was unveiled in Sembawang wharves in 2005.