Beginning November 28, 2010, WikiLeaks and five partner newspapers — The New York Times, The Guardian, Der Spiegel, Le Monde, and El País — began publishing selections from roughly 251,000 U.S. State Department cables, obtained from Army intelligence analyst Chelsea Manning, who had downloaded them onto a rewritable CD from a classified network she had legitimate access to as part of her job.
The scale is what distinguished this from prior leaks: Manning did not photocopy a single document, as Daniel Ellsberg had with the Pentagon Papers in 1971, but exfiltrated an entire searchable archive spanning years of diplomatic correspondence, candid assessments of foreign leaders, and details of U.S. relationships that were never meant to be read by the people they described.
The mechanism was asymmetric transparency enabled by digital storage: a single analyst with a low-level security clearance and removable media could move a library's worth of classified material in an afternoon, a capability that outpaced the classification review and monitoring systems built for an era when leaking meant photocopying pages one at a time.
Diplomats worldwide had private conversations become public, straining relationships from the Arab Gulf to Latin America; Manning was court-martialed and sentenced to 35 years, commuted by President Obama in 2017, while Julian Assange spent years in Ecuador's London embassy and then British prison fighting U.S. extradition on charges including violations of the Espionage Act, a case resolved only via a 2024 plea deal.
One cable in particular — describing lavish corruption within Tunisian President Ben Ali's family, published by a Lebanese news site drawing on the leaked archive — circulated widely inside Tunisia in December 2010, arriving just as Mohamed Bouazizi's self-immolation was already igniting protests, and giving demonstrators corroborating detail for grievances about elite corruption that had previously circulated only as rumor.
A separate 2017 release, dubbed Vault 7, disclosed alleged CIA hacking tools for compromising phones, smart televisions, and computers, showing the same organization capable of publishing State Department cables in 2010 could, seven years later, obtain and release intelligence-agency source code — evidence WikiLeaks' model of large-scale document publication had outlived its original leaker and target entirely, and that the vulnerability it first exposed applied to every agency holding digitized secrets, not just the State Department.
Coverage concentrated heavily on Assange's persona and legal jeopardy — a narrative easier to follow than diplomatic cable content — while slower analysis examined how intelligence and diplomatic agencies responded: tightened compartmentalization of information, expanded insider-threat monitoring programs, and more aggressive prosecution of leakers, changes that reduced the openness such agencies had cautiously extended after 9/11 information-sharing reforms.
Edward Snowden's 2013 disclosures about NSA bulk surveillance programs followed directly in this fracture's wake, both in method — digital exfiltration at scale — and in government response, which by then included far more sophisticated internal monitoring specifically designed to prevent a repeat of the Manning case.
Diplomatic cables and war logs published via WikiLeaks forced foreign ministries to assume more of their internal communications might become public. Secrecy did not end; classification hygiene and source-hunting intensified.
Collateral Murder, the Afghan and Iraq war logs, and Cablegate forced governments to confront bulk unauthorized disclosure in the network age. Diplomatic cables' banality and brutality traveled together; foreign ministries spent months managing fallout with named sources and embarrassed partners.
Chelsea Manning's prosecution, Assange's asylum saga, and debates over journalism versus hacking never cleanly resolved. Classification systems responded with harder controls and insider-threat programs. The public learned that secrecy regimes leak at industrial scale when incentives and USB sticks align.
Newsrooms negotiated redaction ethics under deadline and threat; governments negotiated insider-threat programs under embarrassment. The episode permanently linked ‘transparency’ to ‘operational risk’ in diplomatic minds. Secrecy regimes now assume bulk leakage is a scenario, not a fantasy.
Classification reform talk rose then faded; prosecution appetites did not. Diplomats wrote cables knowing they might trend. Secrecy’s cost-benefit math permanently includes viral disclosure as a baseline scenario.
Diplomatic cables today are written with the assumption they may eventually leak, a defensive habit of vagueness diplomats now describe openly; whistleblower prosecutions under the Espionage Act have become more frequent across administrations of both parties, and the legal boundary between journalism and publishing stolen classified material — central to Assange's case — remains unsettled, meaning WikiLeaks changed the threat model for state secrecy without resolving the legal question it raised.
Century Signals note: Published Cablegate and war-log reporting by major newspapers; court records in Manning/Assange matters; contemporaneous diplomatic reaction coverage. Editorial judgment about what still structures the present — not a comprehensive history.