The objective of Force Z, which consisted of one battleship, one battlecruiser and four destroyers, was to intercept the Japanese invasion fleet in the South China Sea north of Malaya. The task force sailed without air support. Although the British had a close encounter with Japanese heavy surface units, the force failed to find and destroy the main convoy. On their return to Singapore they were attacked in open waters and sunk by long-range torpedo bombers. The commander of Force Z, Admiral Sir Tom Phillips, elected to maintain radio silence and an alert was only sent (by the Repulse) one hour after the first Japanese attack.
With the attack on Pearl Harbor only three days earlier, the Malayan engagement illustrated the effectiveness of aerial attacks against even the heaviest of naval assets if they were without air cover. This added to the importance for the Allies of the three USN aircraft carriers in the Pacific: USS Enterprise, Lexington, and Saratoga. The sinking of the two ships severely weakened the British Eastern Fleet in Singapore, and the Japanese fleet was only engaged by submarines until the Battle off Endau on 27 January 1942.