| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Marine (Ground Assault) with the new title Marine. |
| 1 |
20 |
On the front lines of a planetary assault and occupation. |
| 1 |
22 |
Commissioned in Marine (Ground Assault) with the new title Lieutenant. |
| 1 |
22 |
Promoted to Marine (Ground Assault) officer rank 2 with the new title Captain. |
| 2 |
22 |
Continued as Marine (Ground Assault). |
| 2 |
24 |
A mission goes wrong and Chesley Thorebourne is stranded behind enemy lines. Ejected from the service. |
| 3 |
24 |
Failed to qualify for Intelligence (Agent). |
| 3 |
24 |
Submitted to the draft. |
| 3 |
24 |
Switched to Marine (Marine Support) with previous rank. |
| 3 |
27 |
On the front lines of a planetary assault and occupation. |
| 3 |
28 |
Promoted to Marine (Marine Support) officer rank 3 with the new title Force Commander. |