1863Lieutenant John H. Calef of Gloucester fired one of the first shots at the Battle of Gettysburg.Events & Anniversaries, Government and Public Service, World Events, Military

On July 1, 1863, Battery A Second U.S. Artillery, under the command of Lieutenant John H. Calef, along with the Second Brigade Horse Artillery, advanced along the Chambersburg Pike. The first Union gun of the battle was fired from the right section of the road and the position was held under severe fire. Casualties included 12 wounded men and 13 horses killed.
“John H. Calef • Cullum’s Register • 1988.” https://penelope.uchicago.edu/Thayer/E/Gazetteer/Places/America/United_States/Army/USMA/Cullums_Register/1988*.html.