The battleship war in the Atlantic was driven by the attempts of German capital ship commerce raiders—two battleships, the Bismarck and the Tirpitz, and two battlecruisers—to influence the Battle of the Atlantic by destroying Atlantic convoys supplying the United Kingdom. The superior numbers of British surface units devoted themselves to protecting the convoys, and to seek-and-destroy missions against the German ships, assisted by both naval and land-based aircraft and by sabotage attacks. On 24 May 1941, during its attempt to break out into the North Atlantic as a commerce raider, Bismarck engaged the British battleship HMS Prince of Wales and the battlecruiser HMS Hood.