Assigned in 2009 to an Army unit in Iraq as an intelligence analyst , Manning had access to classified databases . In early 2010 , she leaked classified information to WikiLeaks and confided this to Adrian Lamo , an online acquaintance . Lamo indirectly informed the Army 's Criminal Investigation Command , and Manning was arrested in May that same year . The material included videos of the July 12 , 2007 , Baghdad airstrike and the 2009 Granai airstrike in Afghanistan ; 251,287 U.S. diplomatic cables ; and 482,832 Army reports that came to be known as the " Iraq War Logs " and " Afghan War Diary " . The material was published by WikiLeaks and its media partners between April 2010 and April 2011
July 12 , 2007 , Baghdad airstrike
July 12, 2007, Baghdad airstrike
Chelsea Manning