John George Walker (July 22, 1821 – July 20, 1893) was a Confederate general in the American Civil War. He served as a brigadier under Jackson and Longstreet, before commanding a Texan division in the Trans-Mississippi Department, known as Walker’s Greyhounds for their speed and agility. He was ordered to disrupt Grant’s supply-line opposite Vicksburg, but Grant had managed to cross to the East bank, and Walker was reduced to minor operations, one of them against some of the first African-American troops to serve in battle. He was able to make a bigger contribution to the Red River campaign, in support of General Richard Taylor.