The U.S. Army has published its official study/history of the Iraq war. The first link below is to the Army Times article about the study. The second link will get you to the study itself. The Wall Street Journal had a story a little while back about how much resistance there was to letting this study see the light of day. There will undoubtedly be much butt hurt, but also some great insight for those who want to learn.
https://www.armytimes.com/news/your-...r-future-wars/
http://publications.armywarcollege.edu/