In the context of the Ukraine war i’ve read something akin to “once someone close to you, a fellow friend and comrade is killed, it is less about the original how and why, but just about revenge.”
Using cult of personality, the in-group mentality that is strongly advanced in the military, dehumanising of the enemy and other tactics have shown very effective time and time again in human history. There is many countries in history and today, where the military is turned against its own population and i fail to see any moral highground the US could claim to protect against that. The US society is too hungry, too injust, too tribalist and too violent, for there to be effective safeguards. Heck we all saw what happened January 6