If you want to learn more, just watch the movie Dr. Strangelove. It was marketed as a comedy, but people in the know consider it to be non-fiction:

https://en.wikipedia.org/wiki/Dr._Strangelove

General MacArthur was dismissed during the Korean War because the White House weren't sure if he was going to use nukes or not (like the movie.) The policy was that the US was ready (bombers with nukes were positioned in Japan), but President Truman wanted to give final advance approval to commanders, yet MacArthur was issuing his own policy.

https://en.wikipedia.org/wiki/Douglas_MacArthur

(It turns out that MacArthur was right about basically everything he ever said, and continued to advise Presidents.)