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 but stated that they could remain in the second restricted zone. Removal from Military Area No. 1 initially occurred through "voluntary evacuation". Japanese Americans were free to go anywhere outside of the exclusion zone or inside Area 2, with arrangements and costs of relocation to be borne by the individuals. The policy was short-lived; DeWitt issued another proclamation on March 27 that prohibited Japanese Americans from leaving Area 1. A night-time curfew, also initiated on March 27, 1942, placed further restrictions on the movements and daily lives of Japanese Americans. Eviction from the West Coast began on March 24, 1942,