WASHINGTON — As Gen. David Petraeus leaves the Afghan battlefield to run the CIA, he leaves behind a legacy of changes to military tactics and spycraft. U.S. officials say his tenure saw a big increase in the number of Afghan insurgents killed and captured and a drop in violent attacks by militants.

From April to July, nearly 3,000 insurgents were captured in special operations raids. That's twice the number captured for the same time period a year ago, according to NATO headquarters.

No one claims these numbers guarantee anti-government Taliban factions won't reconstitute.

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But the system Petraeus helped institutionalize — a fusion of intelligence and special operations teams — will remain as a legacy of his command, and a clue to what he may do next at the CIA.

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