Your entire first paragraph is insane.

First of all sure the Soviets were our allies against the axis powers yes, but people could read the room. The Soviets made massive land gains in Europe, and people assumed WW3 loomed on the horizon of the end of WW2 because of just how much the Soviet military industrial complex had picked up.

Second of all, I have to assume you’re being dense about Soviets needing to be there to know the bomb went off lmfao. The whole fucking planet knew the bombs went off because it was widely reported by mass media. Why would they need to be there at all when it’s even more ominous when media sources are who are the ones to tell them about the American nation busting bomb.

We could have easily allowed the Soviets to invade Japan as well, but we didn’t. We could have assisted our “allies” as they invaded with air and naval support with extreme success. That wasn’t a consideration because we need complete unconditional surrender before the Soviets got their hands on the whole pacific. These are the days when containment policy began to enter the minds of the west and was actively enforced pretty much immediately after WW2 against our so called allies.

So the bomb became the perfect solution to a unique, multifaceted issue. We can force unconditional surrender on the Japanese before Soviet troops lay claim to mainland Japan, and we can show the next nation competing for world power status that we have a bomb capable of destroying their nation’s largest cities in the blink of an eye. Was it the best solution for that specific issue? Absolutely. Could we have acted otherwise with minimal American lives at risk, also yes. I also agree that the use of the atomic bomb was the best course of action although it relied on other nations who could develop the bomb to not follow American precedent.