The American military, especially at the senior ranks, is apt to let you down whenever courage or moral fortitude is needed most. In nearly 18 years of post-9/11 forever war, not a single general has resigned in specific opposition to what many of them knew to be unwinnable, unethical conflicts.
https://www.theamericanconservative.com/articles/the-generals-wont-save-us-from-the-next-war/