Fact is if Saddam had let the UN arms inspectors in to do their jobs like he was mandated to do after the Gulf war in 91, we would never have gone into Iraq. That simple. As for Vietnam and Korea obviously we didn't listen because we did the same in Iraq and Afghanistan that we did in Korea and Vietnam, sadly our government doesn't have the guts to finish a war that they start. If we had stayed in Iraq ISIS wouldn't have came to power, Iran wouldn't be trying to take the country over, and Iraq would have a rebuilt military and infrastructure and government that were worth a shit and didn't fold under pressure. But no, we started taking casualties, the media wouldn't show the good we did and what we were doing, they would rather talk about casualties because the good we did doesn't bring in ratings.