also you sed that he was driven off planet kronus by the space marines but that depence. if you choose the Tau instead and win then the history change with his victory
I don't believe that tau commander died protecting farsight as he was equipped with a shield generator which deflected the shot and saved both farsight and himself. Unless I read that completely wrong, I believe I'm correct, though I haven't got the book with me at this time to check.