| Term |
Age |
History |
|---|
| 1 |
18 |
Failed to qualify for Naval Academy (Military Academy). |
| 1 |
18 |
Submitted to the draft. |
| 1 |
18 |
Became a Marine (Star Marine) with the new title Marine. |
| 1 |
22 |
Assigned to the security staff of a space station. |
| 1 |
22 |
Promoted to Marine (Star Marine) rank 1 with the new title Lance Corporal. |
| 2 |
22 |
Continued as Marine (Star Marine). |
| 2 |
25 |
Assigned to a black ops mission. |
| 2 |
26 |
Promoted to Marine (Star Marine) rank 2 with the new title Corporal. |
| 3 |
26 |
Attempted to change assignments. |
| 3 |
26 |
Switched to Marine (Ground Assault) with previous rank. |
| 3 |
29 |
Advanced training in a specialist field |
| 4 |
30 |
Continued as Marine (Ground Assault). |
| 4 |
34 |
A mission goes disastrously wrong due to Birtie Costigan's commander’s error or incompetence, but Birtie Costigan survive. |
| 4 |
34 |
Cover for the commander and gain an Ally. |
| 4 |
34 |
Promoted to Marine (Ground Assault) rank 3 with the new title Lance Sergeant. |
| 5 |
34 |
Continued as Marine (Ground Assault). |
| 5 |
38 |
Assigned to a black ops mission. |
| 5 |
38 |
Promoted to Marine (Ground Assault) rank 4 with the new title Sergeant. |
| 6 |
38 |
Continued as Marine (Ground Assault). |
| 6 |
42 |
A mission goes wrong and Birtie Costigan is stranded behind enemy lines. Ejected from the service. |
| 7 |
42 |
Became a Merchant (Broker). |
| 7 |
43 |
Given advanced training in a specialist field |
| 7 |
46 |
Promoted to Merchant (Broker) rank 1. |