United States Navy

The United States Navy was the aquatic military force of the United States of America.

History
The USS Cyclops was a US Navy vessel that mysteriously sank in the Bermuda Triangle in 1918. The Tenth Doctor and Heather McCrimmon discovered that it had been attacked by an Octopod whose spacecraft had crashed in the Triangle previously. The Doctor told Heather that he could not save the ship as it was part of history. (COMIC: Cyclops)

The USS Eldridge was a United States Navy ship used in Earth's Second World War to escort freighters to North Africa and Europe. (AUDIO: The Macros)

During the latter half of the 20th century, the USS Westmoreland shot down an alien craft. (PROSE: Bullet Time)

According to a news report that Anji, Fitz and the Eighth Doctor saw, the USS Delaware was a US Navy vessel that was once attacked 40 miles off the Libyan coast by EZ jet bombers. (PROSE: Trading Futures)

Zach Olson was a member of a US Navy submarine that was attacked in the Indian Ocean by the Praxeus infection. After being infected himself he washed up in Madagascar and was pulled to safety by the Doctor, Aramu and Suki Cheng. He survived just long enough to tell the Doctor about the fate of his submarine and warn her about Praxeus before the infection overwhelmed his body and he exploded. (TV: Praxeus)