| Term |
Age |
History |
|---|
| 1 |
18 |
Failed to qualify for Law Enforcement (Agent). |
| 1 |
18 |
Became a Drifter (Wanderer). |
| 1 |
19 |
Dennis Mason do not know what happened to Dennis Mason. There is a gap in Dennis Mason's memory. |
| 2 |
19 |
Became a Marine (Star Marine) with the new title Marine. |
| 2 |
22 |
A mission goes disastrously wrong due to Dennis Mason's commander’s error or incompetence, but Dennis Mason survive. |
| 2 |
22 |
Report commander and gain an Enemy. |
| 2 |
23 |
Promoted to Marine (Star Marine) rank 1 with the new title Lance Corporal. |
| 3 |
23 |
Continued as Marine (Star Marine). |
| 3 |
26 |
Assigned to a black ops mission. |
| 3 |
27 |
Promoted to Marine (Star Marine) rank 2 with the new title Corporal. |