June was the deadliest month for the U.S. military in Afghanistan since the invasion in October 2001. July became the second straight month in which casualties exceeded those in Iraq, where four times as many U.S. troops are on the ground. More Americans have been killed in Afghanistan since the invasion began than in the first nine years of the Vietnam War, from 1956 to 1964.

As in Vietnam, the U.S. has never lost a tactical engagement in Afghanistan, and this tactical success is still often conflated with strategic progress. Yet the Taliban insurgency grows more intense and gains more popular traction each year. More and more, the American effort in Afghanistan resembles the Vietnam War—with its emphasis on body counts and air strikes, its cross-border sanctuaries, and its daily tactical victories that never affected the slow and eventually decisive erosion of rural support for the counterinsurgency.

As the Russian ambassador to Afghanistan, Zamir Kabulov, noted in a blunt interview with the BBC in May, the current military engagement is also beginning to look like the Soviets’ decade-long Afghan adventure, which ended ignominiously in 1989. That intervention, like the current one, was based on a strategy of administering and securing Afghanistan from urban centers such as Kabul and the provincial capitals. The Soviets held all the provincial capitals, just as we do, and sought to exert influence from there. The mujahideen stoked insurgency in the rural areas of the Pashtun south and east, just as the Taliban do now.

The U.S. engagement in Afghanistan is foundering because of the endemic failure to engage and protect rural villages, and to immunize them against insurgency. Many analysts have called for more troops inside the country, and for more effort to eliminate Taliban sanctuaries outside it, in neighboring Pakistan. Both developments would be welcome. Yet neither would solve the central problem of our involvement: the paradigm that has formed the backbone of the international effort since 2003—extending the reach of the central government—is in fact precisely the wrong strategy.