John Kennedy (May 14, 1834 – September 28, 1910) was born a British subject in Ireland, and became an American citizen and a private in the Union Army.
He received the United States military's highest decoration for bravery, the Medal of Honor, for his actions during the Battle of Trevilian Station in the American Civil War.
He was born May 14, 1834, and at the Battle of Trevilian Station in Virginia on June 11, 1864, he and four other soldiers were assigned to a twelve-pound-capacity brass artillery piece under direct command of Lt. William Egan, as part of the battery commanded by Lt. Alexander Pennington, within Gen. George Armstrong Custer's Michigan Cavalry Brigade.
The captured privates were imprisoned at the Andersonville prison; Kennedy survived, and served after the war in the Regular Army, advancing to the rank of ordnance sergeant and retiring in 1891.
His Medal of Honor citation in 1892 described his actions as Remained at his gun, resisting with its implements the advancing cavalry, and thus secured the retreat of his detachment.