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Japanese occupation era

During the Japanese occupation of the Philippines, American soldiers were ordered to withdraw from Manila and all military installations were removed by December 24, 1941. Two days later, General Douglas MacArthur declared Manila an open city to prevent further death and destruction but Japanese warplanes continued bombing the city. Japanese forces occupied Manila on January 2, 1942.

From February 3 to March 3, 1945, Manila was the site of one of the bloodiest battles in the Pacific theater of World War II. Under orders of Japanese Rear Admiral Sanji Iwabuchi, retreating Japanese forces killed about 100,000 Filipino civilians and perpetrated the mass rape of women in February. At the end of the war, Manila had suffered from heavy bombardment and became the second-most-destroyed city of World War II. Manila was recaptured by American and Philippine troops.