Achange in US tactics, and the Sunni tribal uprising in An-bar province, have sharply reduced the level of violence in some important parts of Iraq. The violence and numbers of dead are down to the levels of spring 2006, before the escalation of civil violence that tore the country apart. The worst fighting is now concentrated in and around the mixed areas in Diyala. Large parts of Baghdad and many formerly hostile towns in the west are relatively secure. The number of improvised explosive device attacks has also declined. How much of that is due to Iranian restraint, improved US tactics and technology or less active Shia hostility to coalition forces is as unclear as how long the drop will last.

US and Iraqi forces are scoring important, if regional, tactical victories. However, these cover only western and central Iraq and may well be temporary. For all the claims that the "surge" worked, it is clear that it did not work purely on its own. The build-up of US forces and change in tactics from staying in bases to "win and hold" have accomplished a great deal. However, it was only the combination of the tribal uprising in Anbar, the build-up of troops and the change in US tactics that prevented al-Qaeda and its supporters from dispersing to the areas around Baghdad and intensifying the fighting in central Iraq.