The name is derived from the Asia-Pacific War (a part of World War II) from 1941 to 1945 when Bangkok was attacked by the Allied bombers at night, especially Bangkok Noi, because it was the location of the Imperial Japanese Army base and close to many important places, such as Bangkok Noi railway station, Siriraj Hospital, Naval Dockyard Department and Royal Grand Palace in Phra Nakhon side, etc.