7th Battalion Heavy Artillery "4th Battalion Black River Artillery"

1862
	Organized at Sackett's Harbor, N. Y.
September 12	Companies A and B mustered in
September 17	Companies A, B and C moved to Washington, D.C. and garrison duty there
November 12	Company C mustered in
December 27	Company D mustered in and on duty at Fort Schuyler, New York Harbor
December 31	Battalion transferred to 10th New York Heavy Artillery as Companies H, I, K and L