Even with a substantial surge of soldiers along the lines recommended by Jack Keane , a retired four-star general , and the military historian Frederick Kagan of the American Enterprise Institute -- approximately 35,000 more combat troops -- the United States still would n't have enough forces to fight a two-front war against the Sunnis and the Shiites , as it briefly did in 2004 .
Frederick Kagan /business/person/company American Enterprise Institute
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Frederick Kagan
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American Enterprise Institute
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