VideInfra78 said:
What war? Who is the League of Sovereign Planets and why are they in opposition to the Galactic Republic? What is the war over? What extreme measures were taken? Why? What is their relationship to each other? What are their motivations?
Those are all perfectly logical questions. I will do my best to answer them.
The League of Sovereign Planets is a coalition of alien worlds that have banded together in order to combat the perceived Humanocentricism of the Republic. Most of the League's members believe that the playing field ought to be leveled, with regards to the power that the various races have in the galaxy. The more radical types want to see Humans exterminated altogether.
The League sees itself as having been disenfranchised (economically, politically, and socially) and taken advantage of by the Humans overseeing the Republic. As an aside, not *all* non-Human species have joined the League. But because of the League's military buildup (through the use of cloning technology that has been banned in Republic space), aliens in the Republic are looked upon with fear and suspicion, with certain elements of the Core (such as the Chancellor) calling for their systematic internment.
Others still want the aliens to be enslaved and eventually wiped out...these people will form the nucleus of the Empire.
So as you see, the Clone Wars turn out to be a self-fulfilling prophecy. The hatred and xenophobia on both sides provides the tinder with which one spark will immolate the entire galaxy.
The "extreme measures" are the Republic's buildup of military forces coupled with an increasingly potent attitude of xenophobia in the higher circles of authority. For the League, the extreme measures are the recent induction of a hundred worlds in less than two years and the synthesis of armies of genetically-engineered supersoldier clones, copies of the greatest warriors of so many races.
I put quite a bit of thought into the causes of the Clone Wars. I demanded that they be as different as possible from the causes suggested in the Lucas prequels. Hell, I'm still not sure why those were fought. Something about tax disputes, I think.
But my attempt at rationalizing the Clone Wars involves a lot of Third Reich-style drawing of battle lines based on race. It reinforces the "us vs. them" atmosphere needed for a titanic existential conflict that ultimately ends in the destruction of both factions...only to have the spoils ruled over by an even greater menace: the Empire.
I hope that clears things up. More of the outline will come soon.