| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Scout (Surveyor). |
| 1 |
19 |
Oswald Withers have no idea what happened to Oswald Withers – they found Oswald Withers's ship drifting on the fringes of friendly space. |
| 2 |
19 |
Became a Marine (Ground Assault) with the new title Marine. |
| 2 |
22 |
Display heroism in battle. |
| 2 |
23 |
Commissioned in Marine (Ground Assault) with the new title Lieutenant. |
| 2 |
23 |
Promoted to Marine (Ground Assault) officer rank 2 with the new title Captain. |
| 3 |
23 |
Continued as Marine (Ground Assault). |
| 3 |
27 |
Commanding officer takes an interest in Oswald Withers's career. |
| 3 |
27 |
Promoted to Marine (Ground Assault) officer rank 3 with the new title Force Commander. |
| 4 |
27 |
Attempted to change assignments. |
| 4 |
27 |
Switched to Marine (Star Marine) with previous rank. |
| 4 |
28 |
On the front lines of a planetary assault and occupation. |
| 4 |
31 |
Promoted to Marine (Star Marine) officer rank 4 with the new title Lieutenant Colonel. |
| 5 |
31 |
Continued as Marine (Star Marine). |
| 5 |
34 |
Assigned to the security staff of a space station. |
| 5 |
35 |
Promoted to Marine (Star Marine) officer rank 5 with the new title Colonel. |