lb/pb
It won't be a military coup. It will be the military eradicating agents of a foreign nation.
10 U.S. Code § 252 - Use of militia and armed forces to enforce Federal authority
10 U.S. Code § 253 - Interference with State and Federal law
10 U.S. Code § 8063 - United States Marine Corps: composition; functions
They're not long. I'll post them again if anons express interest.