a great overview, nothing to add to this!
in my own experience, I knew that I could win fights, BUT I had a evasive manner (unless i was drunk, when I was the agresssor more often - different story).
Contrary to what most people think, a diffident manner invites further confrontation as bullies will continue to push.
It's all about winning the confrontation. Sun Tzu believes that it's strategically best to do so without a fight at all.
I cant say I won all the fights that my demeanor caused, but I did want to illustrate your point about showing that you are willing to fight
folks shouldnt worry about looking belligerent