The Maneuver Center of Excellence (MCoE) located at Fort Benning has a Self Study Program that covers several categories. One of these categories is Afghanistan. The program serves two purposes. One purpose is to prepare personnel for future deployments to Afghanistan. There are a number of references provided (a reading list) and there is a discussion forum. A second purpose is to glean lessons learned that may be applied to future conflicts where "U.S. forces may again be called upon to assist or intervene in weak states experiencing protracted instability or rebuilding after years of violence". If you are heading to Afghanistan for a deployment you may want to check the sit out at the link below.