| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Marine (Marine Support) with the new title Marine. |
| 1 |
20 |
On the front lines of a planetary assault and occupation. |
| 1 |
22 |
Attempt at commissioned failed. |
| 1 |
22 |
Promoted to Marine (Marine Support) rank 1 with the new title Lance Corporal. |
| 2 |
22 |
Continued as Marine (Marine Support). |
| 2 |
26 |
Assigned to an assault on an enemy fortress. |
| 2 |
26 |
Promoted to Marine (Marine Support) rank 2 with the new title Corporal. |
| 3 |
26 |
Continued as Marine (Marine Support). |
| 3 |
29 |
Assigned to an assault on an enemy fortress. |
| 3 |
30 |
Promoted to Marine (Marine Support) rank 3 with the new title Lance Sergeant. |
| 4 |
30 |
Continued as Marine (Marine Support). |
| 4 |
33 |
On the front lines of a planetary assault and occupation. |
| 4 |
34 |
Promoted to Marine (Marine Support) rank 4 with the new title Sergeant. |
| 5 |
34 |
Continued as Marine (Marine Support). |
| 5 |
38 |
Advanced training in a specialist field |
| 5 |
38 |
Promoted to Marine (Marine Support) rank 5 with the new title Gunnery Sergeant. |
| 6 |
38 |
Continued as Marine (Marine Support). |
| 6 |
39 |
Assigned to an assault on an enemy fortress. |
| 6 |
42 |
Forced to muster out. |
| 7 |
42 |
Became a Army (Cavalry) with the new title Private. |
| 7 |
44 |
Surrounded and outnumbered by the enemy, Ossie Gibson hold out until relief arrives. |
| 7 |
46 |
Promoted to Army (Cavalry) rank 1 with the new title Lance Corporal. |
| 8 |
46 |
Continued as Army (Cavalry). |
| 8 |
47 |
Given a special assignment or duty in Ossie Gibson's unit. |
| 8 |
50 |
Promoted to Army (Cavalry) rank 2 with the new title Corporal. |