Japan is an island and needs external resources in order to survive. When the nuclear bomb was ready Japan was already under siege and nothing could get inside

Japan is an island and needs external resources in order to survive. When the nuclear bomb was ready Japan was already under siege and nothing could get inside or outside by air or sea. Japan was already defeated consuming resources like food or oil and not replenishing them, it was only a matter of time for unconditional surrender(Japanese had already proposed "honorable surrender"). The US documents are already declassified. Nukes were launched because: 1-They were ready, and the military wanted to test it on a real target. The war was going to end before they could test it. 2-To give a clear message to URSS, specially over Europe occupation. For the military there was not a real difference between bombing a city and killing women and children, like was routine by the time, and doing it much faster and effective. Over 50 million people died at WWII. Nukes only killed a small fraction of it.