All commissioned officers in the United States military must make the following oath of office when they are appointed in the U.S. Army, U.S. Air Force, U.S. Navy or U.S. Marine Corps:
“I, (state your name), having been appointed a (rank) in the United States (branch of service), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foriegn and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the office upon which I am about to enter. So help me God.”