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USS Roper
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==Construction== ''Roper'''s keel was laid down on 19 March 1918 by [[William Cramp & Sons]], of [[Philadelphia]]. She was [[ship naming and launching|launched]] on 17 August 1918 sponsored by Mrs. Jesse M. Roper, widow of Lieutenant Commander Roper, and [[ship commissioning|commissioned]] on 15 February 1919.<ref name=DANFS>[[Dictionary of American Naval Fighting Ships]]. [https://www.history.navy.mil/research/histories/ship-histories/danfs/r/roper.html Roper]. Accessed 27 January 2015.</ref> ''Roper'' was the first United States Navy warship to sink a German submarine during World War II.
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