Editing Nikephoros Galen (section)

==The Great Crusade==
{{Main|History of the Green Men}}
As time went by, Galen's discontentment with High Genetor Wilmut Sachs and his methods began to grow. In an act of defiance against his teacher, Nikephoros severed all ties to him and began to work on a universal panacea of his own. Eventually, he discovered that he could create Space Marines immune to all disease by merging plant and human genes together. This project, dubbed '[[Green Men]]' by his friend [[Tribulus Bercilak]], ultimately became Galen's downfall. When the Genetor injected himself with his own Green Man genetic compound, he died at this very instant. What was reborn in his stead had little in common with the Galen of old. Now a cruel, calculating monster, he hatched an insane plan of exterminating all life in the Galaxy in order to replace it with perfect new creatures he and his fellow Genetors created. His madness eventually lead to his exile from the Legion and the establishment of the Green Men as a separate Warband.