1801 - Tripoli declares war against the United States
1836 - U.S. Exploring Expedition authorized to conduct exploration of Pacific Ocean and South Seas, first major scientific expedition overseas. LT Charles Wilkes USN, would lead the expedition in surveying South America, Antarctica, Far East, and North Pacific.
1845 - First U.S. warship visits Vietnam. While anchored in Danang for reprovisioning, CAPT John Percival commanding USS Constitution, conducts a show of force against Vietnamese authorities in an effort to obtain the release of a French priest held prisoner by Emperor of Annam at Hue.
1975 - Marines recapture Mayaguez, go ashore on Koh Tang Island and release the crew.
(Source: Navy News Service)