I offered her a chance to end this war. Together, we would have stood a chance of killing my master and stop the manipulation he has done of both sides.

[It was a tempting offer Maul had put forth. Ending the war would save millions if not billions of lives. Taking out the Sith Lord in charge would assure that the conflict wouldn't be prolonged as well as giving the Jedi much of the credibility they had lost back in the eyes of the people.]