Union navy
| United States Navy | |
|---|---|
Naval jack of the United States (1859–1861) at the start of the U.S. Civil War | |
| Founded | 13 October 1775 |
| Country | United States |
| Type | Navy |
| Role | Sea control Maritime security |
| Size | 84,415 personnel 671 vessels |
| Part of | Department of the Navy |
| Motto(s) | "Semper Fortis" (English: "Always Courageous" (official)) |
| Colors | Blue and gold |
| Anniversaries | 13 October |
| Commanders | |
| Commander-in-Chief | President Abraham Lincoln |
| Secretary of the Navy | Gideon Welles |
| Admiral in Chief | David Farragut |
The Union navy is used to describe the United States Navy (USN) during the American Civil War, when it fought the Confederate States Navy (CSN). The term is sometimes used to describe vessels of war used on the rivers of the interior under the control of the Union army.