| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Marine (Marine Support) with the new title Marine. |
| 1 |
22 |
Advanced training in a specialist field |
| 2 |
22 |
Continued as Marine (Marine Support). |
| 2 |
23 |
Commanding officer takes an interest in Nat Shea's career. |
| 3 |
26 |
Continued as Marine (Marine Support). |
| 3 |
28 |
On the front lines of a planetary assault and occupation. |
| 4 |
30 |
Continued as Marine (Marine Support). |
| 4 |
34 |
Assigned to a black ops mission. |
| 4 |
34 |
Promoted to Marine (Marine Support) rank 1 with the new title Lance Corporal. |
| 5 |
34 |
Continued as Marine (Marine Support). |
| 5 |
36 |
Trapped behind enemy lines. |
| 5 |
38 |
Promoted to Marine (Marine Support) rank 2 with the new title Corporal. |