Reach the indicated level to earn the corresponding rank.

Rank	How to unlock
Level 2	Airman
Level 3	Airman, First Class
Level 4	Senior Airman I
Level 5	Senior Airman II
Level 6	Staff Sergeant I
Level 7	Staff Sergeant II
Level 8	Technical Sergeant I
Level 9	Technical Sergeant II
Level 10	Master Sergeant I
Level 11	Master Sergeant II
Level 12	Senior Master Sergeant I
Level 13	Senior Master Sergeant II