The unit wintered in Thibodaux, Louisiana and in April 1863 took part in the First Bayou Teche Campaign in western Louisiana, being engaged in the Battle of Fort Bisland among other actions. At the close of this campaign, one section of the battery remained at Point Coupee, Louisiana while the other two participated in the Siege of Port Hudson, Louisiana in May and June. During the first assault on Port Hudson in May, the right section of the battery advanced to within 300 yards of the Confederate fortifications and remained in that position for the duration of the siege. During the latter part of 1863, the battery was consolidated to a four gun battery due to losses in combat and from disease. It was stationed at various points in western Louisiana during the fall including Vermillionville and went into winter quarters at New Iberia.