When Major General Frederick Steele of the Union Army began the Camden Expedition in the spring of 1864 to support the Red River Campaign, Harris's Battery was part of the Confederate force sent to confront Steele. On April 10, during the Battle of Prairie D'Ane, Harris's Battery, along with Collin's Missouri Battery, participated in an artillery duel with three Union batteries: the Springfield Illinois Light Artillery, Battery E, 2nd Missouri Light Artillery, and Voegele's Wisconsin Battery. The firefight began around 5:00 p.m. and continued until after sunset. The Confederate artillery fire was not very effective, as the Confederate cannons were of "old and inferior pattern" according to historian Michael J. Forsyth. On April 15, the battery was involved in a skirmish near Gallups; it next fought at the Battle of Poison Spring on the 18th. At Poison Spring, Harris's Battery was part of the brigade of Colonel Colton Greene. The battery was position on the right flank on the Confederate line and provided artillery support for a Confederate charge against a Union wagon train.