How many years minimum must a cadet succesfully complete in JROTC to earn increased enlisted rank after the completion of basic training in the US Military?

To earn an increased enlisted rank after completing basic training in the U.S. Military, a cadet must successfully complete at least two years in JROTC. This typically allows them to enter the military at a higher rank than a recruit who has not participated in JROTC. The exact rank advancement can vary by branch and specific program guidelines.