Via Secrecy News:
The Guide explains that when you are in the Army, your first duty is not
to the Army, but to the U.S. Constitution. “Put [your] obligations in
correct order: the Constitution, the Army, the unit, and finally,
self.” See “The Soldier’s Guide,” Field Manual, 7-21.13, February 2004, with Change 1, September 20, 2011.