At around 5:00 in this
podcast (sorry, Megaphone/Spotify podcasts are fucked up, and it’s hard to get a link to an episode page), Adam Tooze mentions that US military officers are sworn to obey the Constitution, NOT the president. There is something similar in Korea, and it’s what let several top generals ignore Yoon’s martial law order.
In Korea, they are very aware of coups and dictatorships and are ready for them. Here, not really.
Still, if it comes to that (and it is very possible that it will) I hope despite my doubts, that some of the military will use this.