| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Citizen (Worker). |
| 1 |
19 |
Chesley Duncan rise to a position of power in Chesley Duncan's colony or corporation. |
| 1 |
22 |
Promoted to Citizen (Worker) rank 1. |
| 2 |
22 |
Continued as Citizen (Worker). |
| 2 |
25 |
Spent time maintaining and using heavy vehicles. |
| 2 |
26 |
Promoted to Citizen (Worker) rank 2 with the new title Technician. |
| 3 |
26 |
Continued as Citizen (Worker). |
| 3 |
28 |
Chesley Duncan gain experience in a technical field as a computer operator or surveyor. |
| 3 |
30 |
Promoted to Citizen (Worker) rank 3. |
| 4 |
30 |
Continued as Citizen (Worker). |
| 4 |
32 |
Advanced training in a specialist field. |
| 4 |
34 |
Promoted to Citizen (Worker) rank 4 with the new title Craftsman. |