On July 25th 2010 WikiLeaks published classified documents about the war in Afghanistan, it was one of the largest leaks in U.S military history. The Afghan War documents leak was the disclosure of a collection of internal U.S. military logs of the War in Afghanistan. The logs consist of over 91,000 Afghan War documents, covering the period between January 2004 and December 2009. Most of the documents are classified secret. As of 28 July 2010, only 75,000 of the documents have been released to the public, a move which Wikileaks says is “part of a harm minimization process demanded by [the] source”. Prior to releasing the initial 75,000 documents, WikiLeaks made the logs available to The Guardian, The New York Times and Der Spiegel in its German and English online edition, which published reports per previous agreement on that same day, 25 July 2010.
The leak, which is considered to be one of the largest in U.S. military history, revealed information on the deaths of civilians, increased Taliban attacks, and involvement by Pakistan and Iran in the insurgency. WikiLeaks says it does not know the source of the leaked data. The three outlets which had received the documents in advance, The New York Times, The Guardian, and Der Spiegel, have all concluded that they are genuine when compared with independent reports.