[1] By 1861, Hexamer, with the rank of major, was commander of a militia battery called the Hudson County Artillery.
[2] At the beginning of the war, Governor Charles Smith Olden and Hexamer offered his battery to the federal government.
[6] The guns accompanied the federal advance toward Salem Church and supported an attack on the brigade of Brig.
[7] When VI Corps was forced onto the defensive, Parsons’ guns supported the infantry line until their ammunition ran low.
[9] Parsons remained in command for the Battle of Gettysburg, in which Battery A was assigned to the Reserve Artillery.
In 1864, Hexamer’s battery continued in the Reserve Artillery in the Overland Campaign until the Battle of Cold Harbor, when it was assigned to VI Corps.