In February 1864, the 15th Massachusetts Battery took part in an uneventful expedition to Madisonville, Louisiana, returning to New Orleans at the end of that month. It was posted at Terrell's Cotton Press in New Orleans from May 5 to October 17. On the latter date, the battery boarded a steamship for an expedition into Arkansas. They reached the mouth of the White River where they remained until November 7, then moved again by steamship up the White River to DeValls Bluff, Arkansas. After 20 days, the unit moved to Memphis, Tennessee remaining there for the month of December 1864. On January 1, 1865, the battery returned to Louisiana.
