I agree with Kirin'Tor's assessment of the events, but not his ultimate conclusion. For the fighter to do what you describe, he is acting Chaotic (Good). To me, the events you describe are highlight the classic difference between the prototypical Paladin and Ranger (I know, I know- Rangers can be other alignments now, but work with me, people). The Paladin would suffer the rules of the kingdom even if personally distasteful, or leave. The Ranger would have none of that nonsense, and lead the charge to free the people. The gotcha in your story is your fighter then re-establishing Law; a true CG character would generally leave well-enough alone after deposing the baddie King. *shrug* I would still vote CG, though, for his fundamental notion of destroying the existing (legal) power structure.