This is what gives me the most trouble getting my head around. Some say that any who rise to the heights had to sell their souls, and they will somehow rationalize violating the oath.
I'm not quite that cynical (yet).
I'll pray for courage to refuse to obey illegal orders, which are pretty likely to be issued.
I think the still active duty “brass” have already abdicated their leadership roles, given the past few years of evidence.
But I am exactly that level of cynical, probably more than you can imagine.