Spar-100, abbreviated into S-100, nicknamed Alton, was a clone trooper bred from the DNA of Exhart Martineus, trained his whole life to become one of the first Spar-class Advanced Recon Commandos for the army of the Great Clone Forces. As a clone trooper, he fought for the Galactic Republic in the conflict known as the Second Clone Wars. Alton was one of the first graduants of the Spar ARC trooper program to die in the war.