Troop H of the 1st Pennsylvania Cavalry served in the Mexican Border Expedition and in World War service. In 1916, Capt. Charles C. McGovern was the commanding officer, with 1st Lieutenant James J. Firestone, 2nd Lieutenant John H. Shenkel, and First Sergeant Ralph H. Dillon listed among the troop's personnel. In 1917-1918, Capt. Charles C. McGovern remained commanding officer, with 2nd Lieutenant John H. Shenkel and First Sergeant U. Stephen Madden listed in World War service.