So nice to be an arm chair general with 20/20 hindsight isn’t it?. Hiroshima was a military target as it was an army base and communications center. I am sick and tired of hearing this nonsense. The Japanese launched a war they had ever intention of winning. They attacked us and took a gamble. They lost. Tough sh!t for them.
Actually I never made General rank. I retired from the Air Force as a Colonel. I did graduate from the Air War College, at which we studied a lot of strategic issues, including some from WW II. I think my educated opinion is just as valid as anyone else's and maybe better than most.
My book, A Fighting Chance: The Moral Use of Nuclear Weapons, has a very favorable foreword written by Edward L. Rowney, former adviser to the President on arms control matters. I argue there, at great length, that nuclear weapons can be used morally, in compliance with the Just War Doctrine. Doing so means aiming them at military targets, not at civilians who are not fighting us, and under a dictatorship, have little voice in the conduct of a war.