| Term |
Age |
History |
|---|
| 1 |
12 |
Failed to qualify for Marine Academy (Military Academy). |
| 1 |
12 |
Submitted to the draft. |
| 1 |
12 |
Became a Dolphin Military (Guardian). |
| 1 |
14 |
Commanding officer takes an interest in Denver McKerras's career. |
| 1 |
16 |
Promoted to Dolphin Military (Guardian) rank 1. |
| 2 |
16 |
Continued as Dolphin Military (Guardian). |
| 2 |
17 |
Severely injured. Fully recovered. |
| 3 |
17 |
Failed to qualify for Worker (Citizen). |
| 3 |
17 |
Became a Dolphin Civilian (Nomad). |
| 3 |
20 |
A war or insurgency erupts on Denver McKerras's world. Denver McKerras is drafted into the military. |
| 4 |
20 |
Switched to Dolphin Military (Sea Patrol) with the new title Lance Corporal and previous rank. |
| 4 |
22 |
Receive special training in underwater mine disposal. |