Well-oiled
This from the Seattle Post-Intelligencer:

U.S. troops regarded the looting [in Baghdad] as a release from years of pent-up anger and frustration.

From their Humvees, tanks and armored personnel carriers, the soldiers watched the events of the day -- lootings and homecoming weekend-style bonfires -- with smiles on their faces.

At least one exception to the leniency by U.S. soldiers was the Oil Ministry. American troops in desert camouflage, their M-16s pointed to the street, peered from the overhang above the ministry's entrance.