What is the Mission in Iraq? Please Respond…

What is the mission of coalition troops in Iraq today?  This is a legitimate question that I would like responses to.  I’m not trying to prove a point, I’m just asking.  The removal of Saddam Hussein was a noble act and a just cause for going to war, even without WMD’s, ties to terrorism, or threats to his neighbors.  Hussein was a cruel dictator and the world is better with him gone.  I also understand the rationale behind staying to ensure fair democratic elections.  It is true that the Al Maliki government is not completely stable, but it is doubtful if it will ever be stable as long as coalition troops are there.  There is still violence in Iraq, but there can be no question that much of it is because of the presence of Western troops on Muslim soil.  The Bathists have for the most part been defeated.  Is it within the scope of the mission for the United States and Britain to prevent a civil war and Iraq?  It looks more and more like that is what they are doing.