| Term | History |
|---|
| 1 | Became a Ground Assault at age 18 |
| 1 | Is now a Marine |
| 1 | Trapped behind enemy lines. |
| 1 | Promoted to Ground Assault rank 1 |
| 1 | Is now a Lance Corporal |
| 2 | Continued as Ground Assault at age 22 |
| 2 | Refused to take part in a black ops mission that goes against the conscience and ejected from the service. |
| 3 | Became a Line/Crew at age 26 |
| 3 | Is now a Crewman |
| 3 | Vessel participates in a notable military engagement. |
| 3 | Promoted to Line/Crew rank 1 |
| 3 | Is now a Able Spacehand |
| 4 | Continued as Line/Crew at age 30 |
| 4 | Vessel participates in a diplomatic mission. |
| 4 | Gain a contact. |
| 4 | Promoted to Line/Crew rank 2 |
| 4 | Is now a Petty Officer, 3rd class |
| 5 | Continued as Line/Crew at age 34 |
| 5 | Birth or Death involving a family member or close friend. |
| 5 | Promoted to Line/Crew rank 3 |
| 5 | Is now a Petty Officer, 2nd class |
| 6 | Continued as Line/Crew at age 38 |
| 6 | Commanding officer takes an interest in your career. |
| 6 | Promoted to Line/Crew rank 4 |
| 6 | Is now a Petty Officer, 1st class |
| 7 | Continued as Line/Crew at age 42 |
| 7 | Amnesia. |
| 7 | Forced to muster out. |
| 8 | Became a Infantry at age 46 |
| 8 | Is now a Private |
| 8 | Thrown into a brutal ground war |
| 8 | Injured. |
| 9 | Continued as Infantry at age 50 |
| 9 | Assigned to a planet with a hostile or wild environment. |
| 10 | Continued as Infantry at age 54 |
| 10 | Sent to a very unpleasant region (jungle, swamp, desert, icecap, urban) to battle against guerrilla fighters and rebels. Discharged because of stress, injury or because the government wishes to bury the whole incident. |
| 10 | Gain rebels as Enemy |
| 11 | Became a Scavenger at age 58 |
| 11 | Suffer from a life-threatening illness. |
| 12 | Became a Courier at age 62 |
| 12 | You survey an alien world. |