The first submarine used in was the Turtle on September 6, 1776 during the Revolutionary War. While it did virtually no damage to British ships it did provide a glimpse of the future. By the beginning of the 20th century many nations had added subs to their navies with the USS Holland launched in 1900 being the first for the U.S. Navy. World War I began the era of submarine warfare at scale with the first victory by a modern sub occurred on Sept 5, 1914 with the sinking of a British cruiser by a German submarine. Unrestricted submarine warfare by the Germans was a major factor in bringing the U.S. into the war. The German submarines were effective. Un the last months of 1916 they sank 443,000 tons of Allied merchant shipping; a portend of what was to come in World War II. In fact the success of the German subs in 1916 and early 1917 almost caused Britain to collapse. Germany had 65 subs at the start of World War ii and built over 1,000 more during the war. The Battle of the Atlantic became a crucial theater of conflict and eventual the Allies won that battle. The U.S. used ubss in the Pacific to successfully attack Japanese merchant shipping severely retarding the movement of materials and supplies to the holding in the Pacific. U.S. Navy subs sunk 1,391 enemy vessels during the war. Post World War II the U.S. became a nuclear Navy with the launch of the USS Nautilus nuclear powered submarine in 1955. During the Cold War the U.S. and Soviets Union both maintained and deployed large submarine forces on a global scale. Today, the U.S. submarine force still deploys ballistic missile subs and attack subs in the oceans of the world.