United States diplomatic cables leak

An incident, commonly referred to as Cablegate, began on 28 November 2010 when WikiLeaks began releasing classified cables that had been sent to the U.S. State Department by 274 of its consulates, embassies, and diplomatic missions around the world. Dated between December 1966 and February 2010, the cables contain diplomatic analysis from world leaders, and the diplomats' assessment of host countries and their officials.

Source: Wikipedia — United States diplomatic cables leak (CC BY-SA 4.0)