A huge cache of secret US military files today provides a devastating portrait of the failing war in Afghanistan. The disclosures come from more than 90,000 records of incidents and intelligence reports about the conflict obtained by the whistleblowers' website Wikileaks in one of the biggest leaks in US military history. The files, which were made available to the Guardian, the New York Times and the German weekly Der Spiegel, give a blow-by-blow account of the fighting over the last six years. The war logs [detail]: How a secret "black" unit of special forces hunts down Taliban leaders for "kill or capture" without trial. How the US covered up evidence that the Taliban have acquired deadly surface-to-air missiles. How the coalition is increasingly using deadly Reaper drones to hunt and kill Taliban targets by remote control from a base in Nevada. The logs detail, in sometimes harrowing vignettes, the toll on civilians exacted by coalition forces: events termed "blue on white" in military jargon. The logs reveal 144 such incidents. Some of these casualties come from the controversial air strikes ... but a large number of previously unknown incidents also appear to be the result of troops shooting unarmed drivers or motorcyclists. Rachel Reid, who investigates civilian casualty incidents in Afghanistan for Human Rights Watch, said: "These files bring to light what's been a consistent trend by US and Nato forces: the concealment of civilian casualties."