| Term |
Age |
History |
|---|
| 1 |
18 |
Failed to qualify for Marine Academy (Military Academy). |
| 1 |
18 |
Submitted to the draft. |
| 1 |
18 |
Became a Marine (Star Marine) with the new title Marine. |
| 1 |
20 |
Advanced training in a specialist field |
| 1 |
22 |
Promoted to Marine (Star Marine) rank 1 with the new title Lance Corporal. |
| 2 |
22 |
Continued as Marine (Star Marine). |
| 2 |
26 |
Commanding officer takes an interest in Duke Lamb's career. |
| 2 |
26 |
Promoted to Marine (Star Marine) rank 2 with the new title Corporal. |
| 3 |
26 |
Continued as Marine (Star Marine). |
| 3 |
30 |
On the front lines of a planetary assault and occupation. |