The U.S. has been engaged in counterinsurgency off and on since the Vietnam War. Mostly we haven't been very good at it, at least as I remember the history.
If the subject interests you, see an article in Air Force Magazine which takes a long view of COIN, as counterinsurgency is now abbreviated. The treatment is thorough and not overly optimistic.
The Romans were pretty good at COIN, in an era when human rights didn't signify for much. Their model for dealing with troublesome tribes was kill all the adult males, sell the women and children into slavery, and move in friendly settlers to take over the land.
To a degree Chairman Mao followed the Roman model in taking over China. We cannot follow the Roman model, and a better one hasn't emerged.
