The original mission was to topple Saddam's regime. That was the mission successfully accomplished.<quoted text>Bush W lied when he landed a fighter jet on an American aircraft carrier and announced 'Mission Accomplished" as if he had personally defeated Iraq tyrant Saadam Hussein and al -Qaeda himself.
No one anticipated the onslaught of insurgents and al Qaeda joining the fight and calling Iraq the "frontlines".
They can be criticized, perhaps, for not anticipating that as a possibility, but war doesn't come with a crystal ball.
We had no choice at that point but to fight. Unfortunately, it took a long time to regroup before the surge finally ended it.