| Term |
Age |
History |
|---|
| 1 |
12 |
Became a Dolphin Civilian (Nomad). |
| 1 |
13 |
Burrell Burton fail a dangerous mission to rescue people in a sinking vessel or underwater city. |
| 1 |
16 |
Promoted to Dolphin Civilian (Nomad) rank 1. |
| 2 |
16 |
Continued as Dolphin Civilian (Nomad). |
| 2 |
19 |
A war or insurgency erupts on Burrell Burton's world. Burrell Burton is drafted into the military. |
| 3 |
19 |
Became a Dolphin Military (Guardian). |
| 3 |
20 |
Commanding officer takes an interest in Burrell Burton's career. |
| 3 |
23 |
Commissioned in Dolphin Military (Guardian) with the new title Lieutenant. |
| 3 |
23 |
Promoted to Dolphin Military (Guardian) officer rank 2 with the new title Captain. |