I, (NAME), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God.
“我謹莊嚴宣誓,我決心維護和捍衛合眾國憲法,防止被國內外一切敵人侵犯。我必忠勤盡責,根據統一軍隊法典和規章紀律,服從合眾國總統和其他上級軍官的命令,願上帝助我。”
http://usmilitary.about.com/od/joiningthemilitary/a/oathofenlist.htm