| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Scholar (Field Researcher). |
| 1 |
20 |
An expedition or voyage goes wrong, leaving Alden Horton stranded in the wilderness. |
| 2 |
20 |
Failed to qualify for Intelligence (Agent). |
| 2 |
20 |
Submitted to the draft. |
| 2 |
20 |
Became a Navy (Line/Crew) with the new title Crewman. |
| 2 |
21 |
Advanced training in a specialist field. |
| 2 |
24 |
Promoted to Navy (Line/Crew) rank 1 with the new title Able Spacehand. |
| 3 |
24 |
Continued as Navy (Line/Crew). |
| 3 |
27 |
Display heroism in battle, saving the whole ship. |
| 3 |
28 |
Commissioned in Navy (Line/Crew) with the new title Ensign. |
| 3 |
28 |
Promoted to Navy (Line/Crew) officer rank 2 with the new title Sublieutenant. |
| 4 |
28 |
Continued as Navy (Line/Crew). |
| 4 |
30 |
Severely injured. Fully recovered. |