In US Army

Did the Civil Service Act of 1883 mandates that all males over 18 must serve in the military for at least 2 years?

NO ... it was An Act to regulate and improve the civil service of the United States .... Be it enacted by the Senate and House of Representatives of the United States of Amer (MORE)

Are us male citizens required to register with the selective services on their 18 birthday?

Who Must Register? Male US citizens (regardless of where they live) and male permanent resident aliens living in the US who were born after December 31, 1959 are required to (MORE)