| Term |
Age |
History |
|---|
| 1 |
12 |
Became a Dolphin Military (Sea Patrol) with the new title Private. |
| 1 |
15 |
Receive special training in underwater mine disposal. |
| 1 |
16 |
Promoted to Dolphin Military (Sea Patrol) rank 1 with the new title Lance Corporal. |
| 2 |
16 |
Continued as Dolphin Military (Sea Patrol). |
| 2 |
17 |
A mission goes badly wrong when a human leader disregards Ruben Spencer's advice because Ruben Spencer is ‘just
a Dolphin’ and then blames Ruben Spencer for their mistake. Ruben Spencer quitely accept it. |
| 3 |
20 |
Attempted to change assignments. |
| 3 |
20 |
Switched to Dolphin Military (Underwater Commando) with previous rank. |
| 3 |
23 |
Commanding officer takes an interest in Ruben Spencer's career. |
| 3 |
24 |
Promoted to Dolphin Military (Underwater Commando) rank 2 with the new title Corporal. |