Jason Isaacs has joined the cast of an untitled thriller directed by Paul Greengrass ("The Bourne Ultimatum," "United 93") for Working Title and Universal Pictures reports Variety.

Inspired by Rajiv Chandrasekaran's book "Imperial Life in the Emerald City" the fictionalized drama is set in Iraq after the defeat of Saddam Hussein and covers the blunders of U.S. administrators in attempting to reconstruct the country.

Isaacs will play an American military officer, whilst Matt Damon, Greg Kinnear and Amy Ryan also star. Brian Helgeland ("L.A. Confidential") has adapted the script.