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.
Internment of Japanese Americans or sent them to the United States for internment. Brazil also restricted its Japanese Brazilian population. Although Japanese Americans in Hawaii comprised more than one third of the population, businessmen resisted their being interned or deported to mainland concentration camps, as they recognized their contributions to the economy. In the hysteria of the time, some mainland Congressmen (Hawaii was only a U.S. territory at the time, and did not have a voting representative or senator in Congress) promoted that all Japanese Americans and Japanese immigrants should be removed from Hawaii but were unsuccessful. An estimated 1,200 to 1,800 Japanese nationals