The following senior US military leaders at that time were opposed to the dropping of the bomb, and stated that there was no military justification for it:
General Douglas MacArthur, Fleet Admiral William Leahy (the Chief of Staff to the President), General Carl Spaatz (commander of the U.S. Strategic Air Forces in the Pacific), and Brigadier General Carter Clarke (the military intelligence officer who prepared intercepted Japanese cables for U.S. officials); Major General Curtis LeMay ; and Admiral Ernest King, U.S. Chief of Naval Operations, and Fleet Admiral Chester W. Nimitz, Commander in Chief of the Pacific Fleet.