Iwo Jima, Chichi Jima, and Haha Jima were the targets of land-based aircraft for the first time as US Navy Bombing Squadron 109 PB4Y Liberator bombers based at Isley Field, Saipan, Mariana Islands dropped bombed on their airfields. In the United States, USAAF chief General Hap Arnold warned the Joint Planning Staff about the new Japanese Ki-84 fighters. As a precaution, he recommended seizing Iwo Jima to provide emergency airfields for bombers that might be damaged by new Japanese fighters such as the Ki-84.
