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 air attacks on the Mariana Islands too small to be effective. As it was not possible to allocate additional aircraft to bolster these missions, the GDC directed that the offensive cease and that the 6th Air Army be held in reserve to be used against any Allied forces which landed in the Japanese home islands. Overall, more than 80 Japanese aircraft were dispatched against Saipan and Tinian between November 1944 and the end of the offensive in February 1945. The Japanese destroyed 11 B-29s, caused major damage to eight and minor damage to another 35. American casualties were 45 dead and over 200 wounded. USAAF fighters