Was the Iraq War about Oil after All?

Iraq has the fourth largest known oil reserves in the world. Big western oil companies were in charge of development until 1972, when Saddam Hussein seized their assets and threw them out of the country.  Now, 36 years later, the big Western oil companies are coming back. The Maliki government has agreed to sign no-bid service contracts with ExxonMobile, Chevron, British Petroleum, Dutch Shell and the French company, Total, providing a long-term advantage when production increases. Companies from Russia, China and India are not in on the deal. Can the Kurds, Sunnis and Shiites agree on sharing the proceeds? Will US troops be required to maintain security?