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 Jima on February 19, 1945. The island was attacked at least once each day by the Seventh Air Force's B-24s between December 8, 1944, and February 15, 1945, and several of these aircraft were shot down. Cruiser Division 5 also conducted naval bombardments on December 24 and 27 as well as January 5 and 24. In the last of these attacks the heavy cruisers were joined by the battleship . US aircraft also mounted small-scale night attacks to disrupt Japanese repair efforts. In addition, the USAAF continued to attack the other Pacific islands within range of the Marianas until July