Bush invaded Iraq off a hunch that there may have been WMDs. A whopping zero were found, and Bush decided to invade anyway. Then it became a war about democracy and fighting terrorism (AKA oil), and we stayed there much longer than was necessary. Some good came of it, though. We killed Saddam Husein, even though we completely destabilized the Iraqi government and did little to help them create a new one. Now we're busy destabilizing an already unstable Afghanistan (If we're already here looking for terrorists, we might as well force democracy, right?) and dealing weapons to rebels in Syria.