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 across all 33 atolls in 1940. Within the same year, the mandated islands had a total Japanese population of 77,000. The largest towns in the Marshall Islands, Jaluit and Jabor, had a thousand Japanese each, while in the most isolated atolls, the Japanese populace amounted to no more than a few individuals. Korean labourers were also counted recognised as Japanese in official statistics, and accounted for another 1,200 individuals which were brought into the Marshall Islands during the war. There was a sizeable minority of people of mixed Japanese and Marshallese heritage, which was more common in settlements with a