| Name | Class | Country | Year of Launch |
| O (Planned) | M-class Light Cruiser | Germany | 1945 (Projected, not actual) |
| O (Planned) | M-class Light Cruiser | Germany | 1943 (Projected, not actual) |
| O (Planned) | O-class Battlecruiser | Germany | 1941 (Projected, not actual) |
| O'Brien | Sims-class Destroyer | United States | 1939 |
| O2 (Planned) | M2-class Light Cruiser | Germany | 1947 (Projected, not actual) |
| Oberon | O-class Submarine | United Kingdom | 1926 |
| Oi | Kuma-class Light Cruiser | Japan | 1920 |
| Oklahoma | Nevada-class Battleship | United States | |
| Ommaney Bay | Casablanca-class Escort Carrier | United States | 1943 |
| Onami | Yugumo-class Destroyer | Japan | |
| Oregon | Indiana-class Battleship | United States | 1893 |
| Orion | No Classification | Germany | 1930 |
| Orzel | Orzel-class Submarine | Poland | 1938 |
| Oshio | Asashio-class Destroyer | Japan | |
| Ostmark | No Classification | Germany | 1936 |
| Otto Wünsche | Wilhelm Bauer-class Submarine Tender | Germany | 1940 |
| Oyodo | Oyodo-class Light Cruiser | Japan | 1942 |
Search WW2DB & Partner Sites
News
- » Two WW2-era Aircraft Crashed During Dallas Air Show (14 Nov 2022)
- » Wreck of Samuel B. Roberts Found (27 Jun 2022)
- » Wreck of Jantina Found (4 Jan 2022)
- » WW2DB's 17th Anniversary (29 Dec 2021)
- » See all news
Random Photograph
Current Site Statistics
- » 1,124 biographies
- » 334 events
- » 40,821 timeline entries
- » 1,194 ships
- » 342 aircraft models
- » 202 vehicle models
- » 368 weapon models
- » 123 historical documents
- » 247 facilities
- » 468 book reviews
- » 28,663 photos
- » 393 maps
Famous WW2 Quote
"We no longer demand anything, we want war."Joachim von Ribbentrop, German Foreign Minister, Aug 1939
Support Us
Please consider supporting us on Patreon. Even $1 a month will go a long way. Thank you!
Or, please support us by purchasing some WW2DB merchandise at TeeSpring, Thank you!