To be eligible for U.S. citizenship, applicants must not only reside in the U.S. for five years, but also prove they were physically present in the country for at least 30 months during that period.
U.S. law requires almost all male non-citizens between 18 and 25 to register for the Selective Service, a rule that includes lawful permanent residents, refugees, and even undocumented immigrants.
The phrase 'So help me God' in the U.S. Oath of Allegiance is completely optional, and individuals may choose to omit it for personal or religious reasons without changing the legal validity of the oath.
