Green Zone is a 2010 action thriller film directed by Paul Greengrass and written by Brian Helgeland, based on the 2006 non-fiction book Imperial Life in the Emerald City by journalist Rajiv Chandrasekaran. Matt Damon stars as a U.S. Army officer who goes rogue when he discovers covert and faulty intelligence as he hunts for Weapons of Mass Destruction during the 2003 invasion of Iraq.