I was catching up on Strategy Page updates and came across one small paragraph.
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"December 28, 2006: Without much fanfare, much less a press release, the government and Coalition troops have gone to war with Moqtada al Sadrs Mahhi Army militia. Leaders are being arrested or killed. The raids are being carried out with overwhelming speed and force, so that pro-Sadr gunmen have little chance to put up effective resistance. ......Some American commanders are urging that several additional brigades of U.S. combat troops be brought in for a few months, to back the Iraqi security forces, as the Shia militias are taken down."