United States Navy observes its birthday every year on October 13th and is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The US Navy is currently the largest, most powerful navy in the world, with the highest combined battle fleet tonnage. The Fourteenth Naval District formed in 1916 on the Naval Station in Pearl Harbor, Honolulu, Hawaii, now headquarters of the United States Pacific Fleet! Hawaii State Flag! USA Freedom!