World War II: Allied forces begin a military campaign on Japanese-occupied Singapore.

World War II or the Second World War was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks and aircraft played major roles, enabling the strategic bombing of cities and delivery of the first and only nuclear weapons ever used in war. World War II is the deadliest conflict in history, causing the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

The Bombing of Singapore (1944–1945) was a military campaign conducted by the Allied air forces during World War II. United States Army Air Forces (USAAF) long-range bomber units conducted 11 air raids on Japanese-occupied Singapore between November 1944 and March 1945. Most of these raids targeted the island's naval base and dockyard facilities, and minelaying missions were conducted in nearby waters. After the American bombers were redeployed, the British Royal Air Force assumed responsibility for minelaying operations near Singapore, which continued until 24 May 1945.