AdvertisementHow The U.S. Citizenship Oath Came To Be What It Is TodayJuly 04, 2019Audie CornishWynne DavisfacebookEmailA naturalization ceremony of new U.S. citizens at the Hylton Performing Arts Center in Manassas, Virginia. The U.S. citizenship oath today is 140 words. It wasn't until 1929 that the oath's text was standardized, and the oath was amended in 1952 to emphasize service to country as the U.S. faced a growing threat from the Soviet Union. (NPR)