| Term |
Age |
History |
|---|
| 1 |
12 |
Failed to qualify for Army Academy (Military Academy). |
| 1 |
12 |
Submitted to the draft. |
| 1 |
12 |
Became a Dolphin Military (Guardian). |
| 1 |
15 |
Commanding officer takes an interest in Duke Small's career. |
| 1 |
16 |
Promoted to Dolphin Military (Guardian) rank 1. |
| 2 |
16 |
Continued as Dolphin Military (Guardian). |
| 2 |
17 |
Moved to a new world. |
| 2 |
20 |
Promoted to Dolphin Military (Guardian) rank 2. |
| 3 |
20 |
Continued as Dolphin Military (Guardian). |
| 3 |
23 |
Moved to a new world. |
| 3 |
24 |
Promoted to Dolphin Military (Guardian) rank 3. |
| 4 |
24 |
Continued as Dolphin Military (Guardian). |
| 4 |
27 |
Participate in a major sea battle |
| 4 |
28 |
Promoted to Dolphin Military (Guardian) rank 4. |