The Army promotes using a point system, so you need to get as many points as possible. In the Army, you have to meet several criteria if you want to be promoted. The first is a minimum amount of time in service, then a minimum amount of time in the grade (or rank) you hold now...
Add the total of all your years that earned 50 points or more. Tip Reserve retirement points are streamlined through the entire military, so you can use this system for the Army, Navy, Marines or Coast Guard. Advertisement