sentences:  He worked in the Office of Net Assessment in the Office of the Secretary of Defense 1981-1984 where he was author of the first net assessment of the East Asian military balance.He was the Director of Political-Military Affairs on the staff of the National Security Council 1984-1985 where he was the author of NSDD 166, the strategy document for the American operations in Afghanistan.He taught in the Strategy and Policy Department at the Naval War College 1986-1990.