“I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the armed forces of the United States when required by the law; and that I take this obligation freely without any mental reservation or purpose of evasion, so help me God.”
Immigrants must take the oath, so that they promise to: support the constitution, renounce any other oath they may have taken to a foreign country, defend the constitution, be faithful about their allegiance, and bear arms for their country when they are required to do so.