I've heard each of these used in various newscasts over the past week:
The war in Iraq
The war on Iraq
The war against Iraq
In slightly related news, every time I hear the city of Nasiriyah mentioned, my brain thinks of the tune 'Macarena' - discuss. Oh, and Dubya was in town today, so glad he flew into the airbase rather than the int'l airport. That screws up traffic for miles around. (Nothing like telling the hostiles where the Commander in Chief is on any given day, either.)