Counterinsurgency warfare is what used to be called “colonial warfare.” Although the association might make some people uncomfortable—Americans perhaps more than most, given their aversion to colonialism—much of the strategic intent and many of the tactics, techniques, and procedures of modern counterinsurgency derive directly from the colonial wars and police actions of the past.
Murphy, Martin N.
"Brown Waters of Africa: Portuguese Riverine Warfare, 1961–1974,"
Naval War College Review: Vol. 61
, Article 12.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol61/iss3/12