You know what went wrong in Iraq? It's the same thing that's gone wrong in any American military operation since World War II.
We're not in wars to WIN anymore....need proof?
https://www.youtube.com/watch?v=Bk7scgN-37E
Whether we're dealing with nation states or not the object of war is to humble your opponent and beat them into submission....that is THE 1 GOAL of war. And if we're not in wars to win them then we damn sure shouldn't fight them.
W's guys didn't have the right gameplan for holding Iraq, Obama just didn't want to be bothered with either war and here's where we are now...the Democrats were focused on failure from the get go (FACT) and well I hope they are happy with what has occurred. People will always go back to the WMD's as being a red herring for the war in Iraq but at the end of the day when you go to war rightly or wrongly you need to go to WIN. There were plenty of other reasons to go to war with Iraq besides the WMDs and I've explained those reasons but again you go to war to WIN not to make friends.
https://www.youtube.com/watch?v=N_VHEts3fqk