| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Marine (Marine Support) with the new title Marine. |
| 1 |
21 |
Commanding officer takes an interest in Harrison Meyer's career. |
| 1 |
22 |
Commissioned in Marine (Marine Support) with the new title Lieutenant. |
| 1 |
22 |
Promoted to Marine (Marine Support) officer rank 2 with the new title Captain. |
| 2 |
22 |
Continued as Marine (Marine Support). |
| 2 |
25 |
Advanced training in a specialist field |
| 3 |
26 |
Continued as Marine (Marine Support). |
| 3 |
27 |
Refused to take part in a black ops mission that goes against the conscience and ejected from the service. |