World's first submarine attack: the American submersible craft ''Turtle'' attempts to attach a time bomb to the hull of British Admiral Richard Howe's flagship HMS ''Eagle'' in New York Harbor.

American Civil War: The ''H. L. Hunley'', the first submarine to sink a ship, sinks during a test, killing its inventor, Horace L. Hunley.

American Civil War: The Ship becomes the first submarine to engage and sink a warship, the USS Housatonic.

In Groton, Connecticut, the first diesel-powered submarine is commissioned.

World War I: German submarine SMU U-20 sinks RMS Lusitania, killing 1,198 people including 128 Americans. Public reaction to the sinking turns many formerly pro-Germans in the United States against the German Empire.

US Navy salvage divers raise F-4, the first U.S. submarine sunk in accident.

World War I: The United States breaks off diplomatic relations with Germany a day after the latter announced a new policy of unrestricted submarine warfare.

A series of accidental collisions on a misty Scottish night leads to the loss of two Royal Navy submarines with over a hundred lives, and damage to another five British warships.

The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.

The U.S. Navy submarine USS ''Squalus'' sinks off the coast of New Hampshire during a test dive, causing the death of 24 sailors and two civilian technicians. The remaining 32 sailors and one civilian naval architect are rescued the following day.

The German Kriegsmarine submarine (U-boat) ''U-47'' sinks the British battleship HMS ''Royal Oak'' within her harbor at Scapa Flow, Scotland.

World War II: The German submarine ''U-9'' sinks the French coastal submarine Doris near Den Helder.

For the first time in World War II, a German submarine attacks an American ship.

World War II: A Japanese submarine surfaces near the Columbia River in Oregon, firing 17 shells at nearby Fort Stevens in one of only a handful of attacks by the Japanese against the United States mainland.

A Japanese submarine sinks Ship AHS off the coast of Queensland.

World War II: The British destroyers HMS Eclipse and HMS Laforey sink the Italian submarine ''Ascianghi'' in the Mediterranean after she torpedoes the cruiser HMS Newfoundland.

World War II: A hunter-killer group of the United States Navy captures the German submarine German submarine U-505|''U-505''

World War II: The British submarine HMS Tradewind torpedoes Junyō Maru, 5,600 killed.

The first nuclear-powered submarine, the USS Nautilus, is launched in Groton, Connecticut by Mamie Eisenhower, the First Lady of the United States.

The U.S. Navy submarine USS Nautilus is commissioned as the world's first nuclear reactor powered vessel.

The nuclear submarine USS Nautilus travels beneath the Arctic ice cap.

The USS George Washington is launched. It is the first submarine to carry ballistic missiles.

129 people die when the submarine USS ''Thresher'' sinks at sea.

Off the coast of Spain in the Mediterranean, the Ship DSV submarine finds a missing American hydrogen bomb.

The nuclear-powered submarine the USS Scorpion sinks with 99 men aboard 400 miles southwest of the Azores.