 Complete the following phrase:  For the first several months of their service, the battery performed garrison duty at Ship Island off the Mississippi coast, which served as the staging point for Butlers expedition. After proceeding on to Baton Rouge in May 1862, the battery took part in operations in the vicinity of that city, being heavily engaged in the Battle of Baton Rouge on August 5, 1862. In 1863, the battery participated in the 