But what exactly went wrong in Afghanistan? As in Vietnam and Iraq, the U.S. military has not been fighting conventional armies, such as Iraqi forces during Desert Storm, which it is best at. Instead, in all three places, it was conducting what amounts to military social work. U.S. armed forces are fighting guerrillas that melt back into an all-important supportive indigenous civilian population. In Vietnam, initially, U.S. forces used excessive firepower, which alienated civilians; in Afghanistan and Iraq, the U.S. military, forgetting the lessons of Vietnam, did the same thing.
But American citizens ask, “Aren’t our forces more benevolent than the brutal Taliban? Why does the Taliban still get so much support in Afghanistan?” The answer: because they are Afghans. As my book, The Failure of Counterinsurgency: Why Hearts and Minds Are Seldom Won, notes, when fighting indigenous insurgents, the foreign invader never gets the benefit of the doubt.
This central point makes it difficult for great powers to win wars against insurgents, no matter how nice they try to be to the civilian populace. And the U.S. military is usually fairly unfamiliar with the language and culture of distant lands in which they intervene, thus making it difficult to get good information about who is a guerrilla and who is not.