Black Sheep  was originally slated to be the third mission in the Global Liberation Army campaign where players were given command of the Toxin Tractor, a slow-going farm vehicle modified to spray a deadly corrosive agent, and ordered to eliminate a town that had been “corrupted beyond salvation” by the USA’s propaganda. While the mission was ultimately removed from Generals, the Toxin Tractor was available in other campaign missions, as well as in multiplayer and skirmish modes.