On February 18, 1864, the men of the 13th Massachusetts Battery were transferred to the 6th Massachusetts Battery and again transferred a few weeks later to Battery L, 1st United States Light Artillery. As an auxiliary to this unit, they participated in the Red River Campaign, a failed attempt to advance Union forces up the Red River and into Texas. The members of the battery were involved in several engagements during this campaign and suffered casualties during the Battle of Pleasant Hill. At the close of the campaign, the battery returned to New Orleans on June 29, 1864. Two days later, on July 1, they were re-supplied with four field guns and restored as an independent unit. That month they were posted at Camp Parapet just outside of New Orleans were they remained until after the end of the war.
