The Taros Campaign was an Imperial military campaign fought by the 4621st Imperial Guard Army and elements of the Adeptus Astartes to reclaim the Imperial desert Mining World of Taros from the Tau Empire and its Kroot and human (Gue'vesa) allies of the Taros Planetary Defence Force in 998.M41. The campaign was ultimately unsuccessful for the Imperial forces due to the high amount of casualties taken and the fact that Taros remained in the possession of the Tau, who renamed it T'ros.