I think initially they will do what they are ordered to do.The later may be a problem.
Depends upon the orders.
If our troops are ordered to stand against The People, there will be instant and widespread mutiny in the ranks, followed by widespread violence in the streets.
If Congress attempts to compel the military to oust the President, there will be also be widespread mutiny in the ranks, but civil war to boot.
In the unlikely case that Congress does impeach and convict the President, there will still be sectarian violence over it, because most on our side view this exercise as seditious, illegal, and unwarranted.
Over half the country would consider the government to be illegitimate if they remove Trump from office, which will lead to a wholesale unraveling of our government and our culture.
The Democrats are too sick with delusions and anger to care whether they rip the country apart or not, so they must be stopped. Mitch McConnell has said that impeachment stops with him.
I sure hope so. He may be the only person who can prevent a conflagration in this county. At least in the short term. In the long term, I think it's going to come to violence anyway.