The Battle of Poison Spring was fought in Ouachita County, Arkansas on April 18, 1864, as part of the Camden Expedition, during the American Civil War. A Union force commanded by Major General Frederick Steele had moved from Little Rock, Arkansas towards Shreveport, Louisiana in support of Major-General Nathaniel Banks' move up the Red River towards Shreveport. After Banks was defeated at the battles of Mansfield and Pleasant Hill, Steele was isolated in Arkansas. Short on supplies, Steele sent a detachment commanded by Colonel James M. Williams to search for supplies. Williams' column was attacked by Confederate troops under the command of Brigadiers General John S. Marmaduke and Samuel B. Maxey. After a sharp fight, Williams' command was routed, losing its wagon train and four cannons. T