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|garrison= |current_commander= |commanders= |occupants= |battles= |events= }} Fort Jay, a coastal star fort and the name of the former Army post, is located on Governors Island in New York Harbor. Fort Jay is the oldest defensive structure on the island. It was built to defend Upper New York Bay, but has served other purposes. The National Park Service administers Fort Jay together with Castle Williams as the Governors Island National Monument. ==American Revolution== Fort Jay is situated on the location of earthworks originally built to defend New York City during the American Revolution. General Israel Putnam constructed the first earthen fortification on this site starting in April 1776, and armed it with eight cannons for the defence of New York Harbor. Additional artillery were added and on 12 July 1776 Fort Jay engaged and . The American cannons inflicted enough damage to make the British commanders cautious of entering the East River, which later contributed to the success of General George Washington's 29–30 August retreat from Brooklyn into Manhattan after the defeat in the Battle of Brooklyn. The Americans abandoned the earthworks that September with the eventual British occupation of New York City. The British Army improved the existing earthworks and used the island as a British Navy hospital until they departed on 25 November 1783. At that time Governors Island was conveyed to the State of New York. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fort Jay」の詳細全文を読む スポンサード リンク
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