Wilkerson's Case Against Afghan Escalation: "Dr. Seth Jones, a political scientist with the RAND Corporation, also pointed to the seemingly impossible task of General Petraeus' counterinsurgency strategy. He said the ratio requirement "needed to win a counterinsurgency is 20 security forces per 1000 inhabitants… [Given] the population estimates in provinces where most of the insurgency is taking place, [this] translates into a force requirement of approximately 271,652 forces." (Other estimates are as high as 400,000 troops needed to execute the Petraeus Playbook.) So it really comes as no surprise that Petraeus already signaled he will ask for another 10,000 troops even before the dust had settled on Obama's announcement of an additional 21,000 troops"
(Via The Nation: Top Stories.)