Japanese air attacks on the Mariana Islands and anti-aircraft guns shot down about 37 Japanese aircraft during these raids. After the Marianas began to come under attack, the United States military stepped up its raids on the Japanese-held islands which could be used to launch raids on the B-29 bases. Particular attention was given to Iwo Jima, as it was correctly assumed that the Japanese aircraft which attacked the Marianas were flying from Japan and staging through the island en route to their targets. Following the first raid against Saipan in November, XXI Bomber Command B-29s were dispatched against Iwo Jima's airfields on November 5 and 8.
Japanese settlement in the Marshall Islands Some Marshallese and Koreans reported of maltreatment by the Japanese authorities, and there was at least one case of revolt by both groups at Jelbon on Mili Atoll in which a hundred Japanese civilians and soldiers were killed. When American troops attacked the Marshall Islands between January and April 1944, Japanese troops evacuated many Japanese settlers and Korean labourers from the atolls. A few were reportedly killed in the ensuing air raids, while others who remained behind were captured as Prisoners of war after the Americans captured the atolls, together with some Japanese soldiers. After the Japanese surrender, the Japanese