The Evolutionary Stormtroopers were the High Evolutionary's personal army in his quest to advance the evolution of mankind. Within the army there were "Purifiers" and "Eliminators" who were tasked with dealing with genetic dead-ends such as the Subterraneans, dangerous mutants and drug addicts whereas the High Evolutionary also had scientists and technicians working among them to help study genetics.
The Stormtroopers first appeared in X-Factor Annual #3 by Louise Simonson and Terry Shoemaker. As they were part of a large crossover, and only an army of minor henchman at that, it's unclear who exactly created the team.
Major Story Arcs
For ore information see: Evolutionary War
Acting on behalf of the High Evolutionary, the Stormtroopers were a central force of antagonism towards the heroes in the Evolutionary War crossover and fought against the Avengers, X-Men and Fantastic Four among others.
For more information see: Atlantis Attacks
The Stormtroopers briefly returned in the Atlantis Attacks crossover where the Avengers stumbled upon the remainder of the High Evolutionary's army who still believed the Evolutionary War was going on. U.S.Agent and Hank Pym defeated and captured the last soldier but were no closer to their actual goal of locating the Brides of Set.