The document summarizes the Iraq War that began in 2003 when the U.S. invaded Iraq under the justification that Iraq possessed weapons of mass destruction and had ties to Al-Qaeda. It provides details on key events of the war such as the initial invasion that led to the fall of Baghdad in April 2003, the capture of Saddam Hussein in December 2003, and ongoing fighting with insurgents. It also notes the massive financial cost of over $1 trillion for the United States and the heavy human toll of thousands of American and Iraqi deaths.