Barrett's Missouri Battery was an artillery battery that served in the Confederate States Army during the American Civil War. After entering Confederate service on April 1, 1862, the unit was armed with two 6-pounder smoothboore cannons and two 12-pounder howitzers and was commanded by Captain Overton W. Barrett. It was present during the Siege of Corinth, but saw no action. During the Battle of Perryville in October 1862, Barrett's battery provided artillery support for a Confederate brigade. After spending the next several months moving around Tennessee, the battery supported a Confederate attack during the Battle of Stones River in December. The 1863 Chickamauga campaign brought light action for the unit, which also fought in the Battle of Missionary Ridge. When the Confederates retreat