I believe that the U.S. Military had figured out very well how to balance the need for counter-insurgency specialists and conventional combat forces. By the end of the Vietnam era, the Army returned to the concept of the Ranger Battalion, to be used as a more robust supplement to Special Forces. The Special Operations Wings of the Air Force -composed of EC-130s, AC-130s, CH-53s, and a souped-up version of the "Hueys"- offered potent and flexible tactical air and airlift support. Add to these forces an airborne infantry brigade (173d); and the U.S. had a potent unconventional warfare force capable of addressing a wide array of "small war" insurgencies.

Such organizations would be ideally suited for Afghanistan, where there is (at least, there was) plenty of local support for a force aimed at containing and repelling the Taliban.

By themselves, however, counter-insurgency forces would find it impossible to prevail (in fact, unlikely to survive) in Iraq. The U.S.has undertaken to invade and conquer, and to brutally subjugate a people unwilling to accept defeat and occupation. There, a lot of boots on the ground were needed, in order to discourage the greatest percentage of the population from resisting, and to convince them that resistance to the invader was futile. The Americans didn't have the number of conventional troops to do that, in a manner similar to the Soviets in Hungary ('56) or Czeckoslavakia ('68).

Iraq is not counter-insurgency; it is population control! There, we are fighting disaffected segments of a population which is trying to gain independence There, we are quelling a rebellion by the people against foreign occupation, in a manner much like the Israelis are using against the Palestinians. Our success depends upon targeted assassinations, building walls to isolate populations, and pitting one ethnic grouping against another. I would not dignify such tactics by including them in the sphere of "counter-insurgency".

Fighting regular army units of the North Vietnamese Army was more like fighting the Japanese in Burma than fighting Moros in Mindinao. (In the case of I Corps near the DMZ, the battle was more like fighting the Chinese in Korea 1952-53 or the Japanese in the Philippines 1944-45.) That's conventional warfare in rough terrain, where U.S. conventional forces were more suitable than light infantry Rangers or Special Forces-led paramilitary units.