This, my friends, is the biggest game of chicken I've ever seen.
Military will be totally unable to function if you sack between 10 and 28% of everyone depending on which division we're talking about.
If you're trying to fire almost 30% of the Marines at once... you might even run the risk of them revolting outright and throwing you out on your ass.
If you're Active Duty, you are not allowed to openly speak out against the sitting POTUS.