Fred Kagan’s congressional testimony today is very valuable, published over at TWS (h/t RCP). Read all of it, but this is an important explanation of the phasing of the surge:
The first phase began on January 10th with the announcement of the new strategy and the beginning of the movement of the 5 additional Army brigades and Marine elements into the theater. That deployment process was only completed at the beginning of this month–in fact, critical enablers for those combat forces are still arriving in theater. As the new units entered Iraq, the U.S. military commanders began pushing those that were already in the theater forward from their operating bases into Joint Security Stations and Combat Outposts in key neighborhoods in Baghdad and elsewhere. The purpose of these movements was not to clear-and-hold–the units present in theater were not sufficient in numbers to conduct such operations. The purpose was instead to establish positions within those key areas and to develop both intelligence about the enemy and trust relationships with the local communities that would make possible decisive clear-and-hold operations subsequently. During this phase of the operation, additional Iraqi Security Forces deployed to Baghdad in accord with a plan developed jointly by the U.S. and Iraqi military commands. All of the requested units appeared in the first Iraqi Army rotation, and the Iraqi military has just completed its second rotation of units into Baghdad–again, all designated units arrived, and their fill levels were generally higher than in the first rotation.
Generals Petraeus and Odierno did not allocate the majority of the new combat power they received to Baghdad. Only 2 of the additional Army brigades went into the city. The other 3 Army brigades and the equivalent of a Marine regiment were deployed into the areas around Baghdad that our generals call the “Baghdad belts,” including Baqubah in Diyala province. The purpose of this deployment was not to clear-and-hold those areas, but to make possible the second phase of the operation that began on June 15. The purpose of this operation–Phantom Thunder–is to disrupt terrorist and militia networks and bases outside of Baghdad that have been feeding the violence within the city. Most of the car bomb and suicide bomb networks that have been supporting the al Qaeda surge since January are based in these belt areas, and American commanders have rightly recognized that they cannot establish stable security in the capital without disrupting these networks and their bases.
But even this operation–the largest coordinated combat operation the U.S. has undertaken since the invasion in 2003–is not the decisive phase of the current strategy. It is an operation designed to set the preconditions for a successful clear-and-hold operation that will probably begin in late July or early August within Baghdad itself. That is the operation that is designed to bring security to Iraq’s capital in a lasting way that will create the space for political progress that we all desire.