OK...you're right. I just think of Civil Affairs Units 1st (my G-father was involved with one in WW2). Here is the Gulf Area Corps of Engineers page:
http://www.grd.usace.army.mil/index.html
When we succeed in Iraq the Civil Affair Units will be a huge reason why. They never get any of the glory, but The US Armed Forces would never have been able to achieve so much over the years without them. We just have look at Japan and Germany today to see their success.