Active during the Port Hudson campaign.
The 12th Battery Massachusetts Light Artillery was recruited and mustered into service by detachments during the autumn of 1862, and left Boston by ship for New Orleans, Jan. 3, 1863, arriving at its destination on February 3.
It was on duty at Baton Rouge, La., during the month of March, and was mounted and equipped as cavalry for a short time in April; on duty on the Atchafalaya River near Brashear City from April 17 to May 23; returning to New Orleans, it was on duty at various stations in the vicinity during the summer of 1863, and a detachment was stationed at Port Hudson during the siege.
The battery was stationed at Port Hudson from October 15 until the close of its term of service.
Foraging and reconnoitring expeditions took place by detachments on Dec. 31, 1863; March 16 and 26, 1864; April 26 and May 6; on the latter date a force of the enemy was met in advance on Port Hudson.
Other expeditions took pla