High Quality Content by WIKIPEDIA articles! USS L-4 (SS-43) was an L-class submarine of the United States Navy. Her keel was laid down on 23 March 1914 by Fore River Shipbuilding Company in Quincy, Massachusetts. She was launched on 3 April 1915 sponsored by Mrs. Stephen A. Gardner, and commissioned on 4 May 1916 with Lieutenant (junior grade) Lewis Hancock, Jr., in command. Assigned to the Atlantic Submarine Flotilla, L-4 operated along the Atlantic coast, assisting in the development of new techniques in undersea warfare until April 1917. Following the declaration of war on the Central Powers, the United States Navy dispatched submarines to European waters to protect the Allied shipping lanes. After a Philadelphia, Pennsylvania, overhaul, L-4 departed Newport, Rhode Island, on 4 December and steamed for the Azores. She departed Ponta Delgada on 19 January 1918, arriving for patrol operations at Berehaven, Ireland, on 27 January. While on patrol during April, L-4 twice encountered enemy U-boats in British waters and chased them from the paths of friendly convoys.

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