| Term |
Age |
History |
|---|
| 1 |
12 |
Failed to qualify for Underwater Commando (Dolphin Military). |
| 1 |
12 |
Submitted to the draft. |
| 1 |
12 |
Became a Dolphin Military (Underwater Commando) with the new title Private. |
| 1 |
13 |
Display heroism in battle. |
| 1 |
16 |
Promoted to Dolphin Military (Underwater Commando) rank 1 with the new title Lance Corporal. |
| 2 |
16 |
Continued as Dolphin Military (Underwater Commando). |
| 2 |
19 |
A brutal amphibious warfare campaign forces Duane Hart to spend as much time fighting out of water as in. |
| 2 |
20 |
Promoted to Dolphin Military (Underwater Commando) rank 2 with the new title Corporal. |