One of the most famous of the American privateers, Captain Thomas Boyle sailed "Chasseur" out of Baltimore's waterfront historic neighborhood of Fells Point, where she had been launched from Thomas Kemp's shipyard in 1812. On his first voyage as master of "Chasseur" in 1814, Boyle sailed east to the British Isles, where he harassed British shipping and sent a notice to King George III by way of a captured merchant vessel declaring that the entire British Isles were under naval blockade by "Chasseur" alone. Despite its implausibility, this boast caused the British Admiralty to recall many warships of the Royal Navy back to the home waters from the Napoleonic Wars in Europe and more intense real blockade on the American east coast to guard merchant shipping in convoys. "Chasseur" captured or sank 17 vessels before returning home to Baltimore on 25 March 1815, three months after a peace treaty in Ghent, United Netherlands had been signed ending the War of 1812. Perhaps her most famous accomplishment was the capture of the schooner HMS "St Lawrence".