Bradley Manning wanted to Expose US Bloodlust

Manning plea statement: Americans had a right to know 'true cost of war' | World news | The Guardian: "In a highly unusual move for a defendant in such a serious criminal prosecution, Manning pleaded guilty to 10 lesser charges out of his own volition – not as part of a plea bargain with the prosecution. He admitted to having possessed and willfully communicated to an unauthorised person – probably Julian Assange – all the main elements of the WikiLeaks disclosure.
That covered the so-called "Collateral Murder" video of an Apache helicopter attack in Iraq; some US diplomatic cables including one of the early WikiLeaks publications the Reykjavik cable; portions of the Iraq and Afghanistan war logs; some of the files on detainees in Guantánamo; and two intelligence memos."