Found this:
According to Hague law:
Territory is considered occupied when it is actually placed under the authority of the hostile army.
The occupation extends only to the territory where such authority has been established and can be exercised.
In other words, an armed force is considered in charge if it is, in fact, in charge. Once the occupying force can no longer control the territory, it is no longer an occupying force and is once again simply "the enemy." An occupying force has the absolute responsibility of providing for the basic needs of the people under its control, including food, clothing, shelter, medical attention, and the maintenance of law and order. An occupying force cannot just sit by as occupied territories are looted -- in almost all cases, the laws that were in place in the territory before occupation are still in place after occupation. It is only the enforcer that has changed.
Source:
http://science.howstuffworks.com/rules-of-war4.htmSo if you accept the rules of the Geneva Convention we at least were and occupying force until we threw out the leaders, and weather we are now or not is determined by the will of the people of Iraq.