The End of World War Two As the war with Germany drew closer to the end, the Allies waged an increasingly effective war against Japan. After the fall of the Mariana Islands, including Saipan, to the U.S. in July of 1944, the impending defeat of Japan became increasingly apparent to many Allied and Japanese leaders. The Marianas had been a key area within Japan's defense perimeter; now Japan would be within range of bombing runs from Pacific Ocean locations that were superior to the China bases that had been used for bombing missions. And so from November 1944 onward, Japan was the subject of numerous large scale B-29