| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Marine (Star Marine) with the new title Marine. |
| 1 |
22 |
Commanding officer takes an interest in John Bollen's career. |
| 1 |
22 |
Promoted to Marine (Star Marine) rank 1 with the new title Lance Corporal. |
| 2 |
22 |
Continued as Marine (Star Marine). |
| 2 |
26 |
Assigned to the security staff of a space station. |
| 3 |
26 |
Continued as Marine (Star Marine). |
| 3 |
27 |
Trapped behind enemy lines. |
| 3 |
30 |
Promoted to Marine (Star Marine) rank 2 with the new title Corporal. |
| 4 |
30 |
Continued as Marine (Star Marine). |
| 4 |
33 |
Trapped behind enemy lines. |
| 4 |
34 |
Forced to continue current assignment |
| 4 |
34 |
Promoted to Marine (Star Marine) rank 3 with the new title Lance Sergeant. |
| 5 |
34 |
Continued as Marine (Star Marine). |
| 5 |
36 |
Commanding officer takes an interest in John Bollen's career. |
| 5 |
38 |
Promoted to Marine (Star Marine) rank 4 with the new title Sergeant. |
| 6 |
38 |
Continued as Marine (Star Marine). |
| 6 |
40 |
Assigned to an assault on an enemy fortress. |
| 6 |
40 |
Injured |
| 6 |
42 |
Promoted to Marine (Star Marine) rank 5 with the new title Gunnery Sergeant. |
| 7 |
42 |
Continued as Marine (Star Marine). |
| 7 |
44 |
Assigned to the security staff of a space station. |
| 7 |
46 |
Promoted to Marine (Star Marine) rank 6 with the new title Sergeant Major. |