 The battery was engaged at Petersburg Mine, on July 30, 1864, and Petersburg on August 18, 1864, March 25, 1865, and April 2, 1865, when it fired the signal round that started the attack on Confederate positions, with the 1st Vermont Brigade in the van.It suffered 21 died of disease.Other losses included 8 honorably discharged, 1 promoted to other organizations, 1 transferred to the Veteran Reserve Corps or other organizations, and 5 who deserted.