To put into perspective: South Korea declared Martial Law during the end of 2024 which was short lived as their citizens were awake, not asleep (since a similar thing occurred in 1980 that lasted until 1987) it only ceased when a new president was elected, so they know what their parents have been through back then not letting it slide in modern times which was met with stiff resistance & protest from Gen Z Koreans.
Their president was impeached right after he enacted it as he’s abusing his power via blocking legislators by using both law enforcement and the military averting them from entering their national assembly, including him ordering the arrest of both the judges and supreme court justices whilst illegally declaring martial law (all in which violate their constitution). People there protested against martial law.
This isn’t really possible anymore, State NGs are nationalized so the federal government is already in charge. That’s how JFK enforced desegregation in Alabama, he literally removed the state governor from the chain of command: https://en.wikipedia.org/wiki/Stand_in_the_Schoolhouse_Door
It’s the same reason Walz did basically nothing in Minnesota. If he attempted to direct the NG or even his separate State militia, Trump would have thrown him into a charge under insurrection.
It would fall on the NG or Militia CO to proclaim allegiance to either the state or federal government. Considering what has happened so far, the most you’d see is some resignations.