There was at least one very high ranking officer who opposed using the atomic bomb, Fleet Admiral William Leahy.
Most Americans have never heard of him but he was the highest ranking American military officer of WWII, and FDR’s Chief of Staff.
http://www.doug-long.com/leahy.htm
Never heard of him indeed.
Leahy supported a “demonstration” bomb drop for the Japs... he was voted down. He knew quite a bit about what the bomb would or could do. With the exception of radiation— which was not understood well at all.
The nuke, prevented my father, who served with Patton’s Third Army, and was sent to retrain for the invasion of Japan, from having to go to the Pacific to invade Japan. As a result I am here to be a thorn in the flesh to everyone I meet.
***Fleet Admiral William Leahy.***
Question: How many American lives was he willing to sacrifice so the BOMB would NOT be used!