Sustained increases in U.S. troop levels would not solve the fundamental cause of violence in Iraq, which is the absence of national reconciliation. A senior American general told us that adding U.S. troops might temporarily help limit violence in a highly localized area. However, past experience indicates that the violence would simply rekindle as soon as U.S. forces are moved to another area. As another American general told us, if the Iraqi government does not make political progress, “all the troops in the world will not provide security.” Meanwhile, America’s military capacity is stretched thin: we do not have the troops or equipment to make a substantial, sustained increase in our troop presence. Increased deployments to Iraq would also necessarily hamper our ability to provide adequate resources for our efforts in Afghanistan or respond to crises around the world.