Frederick W. Kagan's testimony on General Petraeus's strategy. An excerpt:
The U.S. has not undertaken a multi-phased operation on such a large scale since 2003, and it is not surprising therefore that many commentators have become confused about how to evaluate what is going on and how to report it. Sectarian deaths in Baghdad dropped significantly as soon as the new strategy was announced in January, and remain at less than half their former levels. Spectacular attacks rose as al Qaeda conducted a counter-surge of its own, but have recently begun falling again. Violence is down tremendously in Anbar province, where the Sunni tribes have turned against al Qaeda and are actively cooperating with U.S. forces for the first time. This process has spread from Anbar into Babil, Salah-ad-Din, and even Diyala provinces, and echoes of it have even spread into one of the worst neighborhoods in Baghdad--Ameriyah, formerly an al Qaeda stronghold. Violence has risen naturally in areas that the enemy had long controlled but in which U.S. forces are now actively fighting for the first time in many years, and the downward spiral in Diyala that began in mid-2006 continued (which is not surprising, since the Baghdad Security Plan does not aim to establish security in Diyala).