Photograph of the Capsized USS Oklahoma and the USS Maryland after the Japanese Attack on Pearl Harbor

The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy against the United States naval base at Pearl Harbor, in the Territory of Hawaii, on the morning of December 7, 1941. The attack led to the United States' entry into World War II. Japan intended the attack as a preventive action to keep the U.S. Pacific Fleet from interfering with military actions the Empire of Japan planned in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States. The attack commenced at 7:48 a.m. Hawaiian Time. The base was attacked by 353 Imperial Japanese fighter planes, bombers, and torpedo planes launched from six aircraft carriers. All eight U.S. Navy battleships were damaged. 2,403 Americans were killed and 1,178 others were wounded.

The first recorded sea battle occurred about 1210 BC: Hittites defeated and burned the Cyprus fleet. Athens protected itself from Persia by building a fleet paid for by silver mines profits. Romans developed the technique of grappling and boarding enemy ships with soldiers. Constantinople invented a Greek fire, a flamethrower to burn enemy's ships. Torpedo was invented by the Arab Hasan al-Rammah in 1275. With the Age of Discovery, naval actions in defense of the new colonies grew in scale. In 1588, Spain sent Armada to subdue the English fleet of Elizabeth, but Admiral Sir Charles Howard won the battle, marking the rise of the Pax Britannica. Anglo-Dutch Wars were the first wars to be conducted entirely at sea. Most memorable of these battles was the raid on the Medway, in which the Dutch sailed up the river Thames, and destroyed most of the British fleet. The 18th century was a period of continuous naval wars, in the Mediterranean, in the Atlantic Ocean, and in the Baltic Sea. The Napoleonic Wars culminating in the Battle of Trafalgar in 1805. With the advent of the steamship, it became possible to create massive gun platforms and to provide them with heavy armor protection. The battle of the CSS Virginia and USS Monitor in the American Civil War that symbolized the changing times. In the 20th century, the steel-armored battleships with large shell turret guns emerged. The Russo-Japanese Battle of Tsushima in 1905 was the first test of the new concepts, resulting in Japanese victory. Airpower became key to navies throughout the 20th century, moving to jets launched from ever-larger carriers, and augmented by cruisers armed with guided missiles and cruise missiles. During the Pacific War of World War II, the carriers and their airplanes were the stars and the United States became the world's dominant sea power. The Falklands War, however, showed the vulnerability of modern ships to sea-skimming missiles. Parallel to the development of naval aviation was the development of submarines. In the 1950s the Cold War inspired the development of ballistic missile submarines.

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