Diplomatic Cable

A diplomatic cable (also called a dispatch or, in U.S. State Department usage, a telegram) is the standard written communication used between a foreign ministry and its embassies, consulates, and missions abroad. The term survives from the era when such messages were transmitted by undersea telegraph cable; today they travel over encrypted electronic systems, but the format and conventions remain remarkably stable.

Cables typically carry a classification marking (e.g., Unclassified, Confidential, Secret), a drafting officer, a list of recipient posts, a subject line, and a body that may include reporting on meetings, political analysis, requests for instructions, or directives from headquarters. They are the working memory of a foreign service: action officers draft them, ambassadors clear them, and analysts back at the capital mine them for context.

Cables are distinct from démarches (the message delivered to a host government), non-papers (informal unsigned texts), and aide-mémoires. A single démarche may generate several cables — one instructing the embassy, one reporting back on delivery, and one transmitting the host government's reaction.

Public awareness of cables surged after the 2010 WikiLeaks "Cablegate" disclosure, in which roughly 250,000 U.S. State Department cables, many routed through the SIPRNet and Net-Centric Diplomacy systems, were released. The episode prompted significant changes to U.S. classified-information handling and renewed debates about the tension between candor in reporting and the risk of leaks.

For researchers, declassified cables — accessible through resources like the U.S. Foreign Relations of the United States (FRUS) series, the National Archives, and the UK's released Foreign Office files — are primary sources of unusual value. They capture diplomats' contemporaneous judgments before events were smoothed by hindsight. MUN delegates and IR students can use them to reconstruct how a position evolved, who pushed back internally, and what arguments persuaded a foreign counterpart.