The Battle of Gloucester Point, Virginia was the first reported exchange of fire in the American Civil War, following the surrender of Fort Sumter. As Lincoln extended the Union blockade to include Virginia, the rebels (notionally Confederates) tried to deny Union access to the local estuaries. On May 7, 1861, Lieutenant Thomas O. Selfridge Jr. commanding the USS Yankee was ordered to reconnoitre the new fortifications at Gloucester Point opposite Yorktown. Shots were exchanged, causing no casualties, Selfridge claiming that his guns were too small to damage the battery, commanded by Lieutenant John Thompson Brown, credited with firing the first cannon shot of the war in Virginia.
^One source gives the date of this engagement as May 8, 1861. Wyllie, Arthur. The Union Navy. Gardners Books 2007. p. 657. ISBN978-1-4303-2117-0. Retrieved April 24, 2011. Other generally reliable sources give the date as May 9, 1861. Parker, William Harwar. The Confederate States Navy, Volume XII of ‘’Confederate Military History’’, edited by Clement Anselm Evans, Atlanta: Confederate Publishing Company, 1899, OCLC29140494, p. 470, retrieved April 22, 2011; Hannings, Bud. Every Day of the Civil War: A Chronological Encyclopedia p. 40. Jefferson, NC: McFarland & Company, Inc., 2010. ISBN978-0-7864-4464-9. Retrieved April 24, 2011; Long, E. B. and Barbara Long. The Civil War Day by Day: An Almanac, 1861–1865. Garden City, NY: Doubleday, 1971. OCLC68283123. p. 72. A few early sources give even later dates in May for this engagement. It is clear, however, that the engagement took place on May 7, 1861. Baker, p. 5; Nesser, p. 74; Scharf, p. 107; Fredriksen, John C. Civil War Almanac. New York: Facts on File, 2007. ISBN978-0-8160-6459-5. p 29; Rush, Lt. Commander Richard and Robert H. Woods. Naval War Records Office, United States. Navy Dept. Official records of the Union and Confederate navies in the war of the rebellion Report of Lt. Thomas O. Selfridge, Jr. to Flag Officer G. J. Pendergrast, May 7, 1861. Washington, DC.: Government Printing Office, 1896. Series 1, Volume 4. OCLC278162008. Retrieved April 22, 2011. p. 381; Scott, Robert N.; U.S. War Department. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies Series 1, Volume 2. Washington: Government Printing Office, 1880. OCLC278162008. p. 821. The May 9, 1861 date of Flag Officer Pendergrast’s report or the wording of one or more of the reports of the engagement may have misled some authors to conclude that the date of the engagement was May 9.