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After the end of World War II, all the Western allies began a rapid drawdown of military forces, including those of signals intelligence. At the time, the US still had a COMINT organization split between the Army and Navy. [1] A 1946 plan listed Russia, China, and a [redacted] country as high-priority targets.
The United States Army Security Agency (ASA) was the United States Army's signals intelligence branch from 1945 to 1977. [1] The Latin motto of the Army Security Agency was Semper Vigilis (Vigilant Always), which echoes the declaration, often mistakenly attributed to Thomas Jefferson, that "The price of liberty is eternal vigilance." [2] [3]
After the end of the Cold War, Germany treated military-related SIGINT differently from other nations, making it a part of the defense-wide electronic warfare organization rather than an intelligence organization. The first unit was set up in Osnabruck in 1957.
The battalion was the army's strategic signals intelligence unit during the Cold War. In 1998, he battalion was disbanded and its tasks and personnel transferred to the Italian Army's 33rd Electronic Warfare Battalion "Falzarego" and the Italian Armed Forces' Information and Security Department.
Units also provided hardcopy summary reports to their tasking authorities. Many USAFSS personnel were dedicated to this mission throughout their Air Force careers, while others moved between TRANSEC/COMSEC and the more traditional SIGINT operations. The TRANSEC/COMSEC mission was occasionally used as a cover story for SIGINT operations.
The birth of signals intelligence in a modern sense dates from the Russo-Japanese War of 1904–1905. As the Russian fleet prepared for conflict with Japan in 1904, the British ship HMS Diana stationed in the Suez Canal intercepted Russian naval wireless signals being sent out for the mobilization of the fleet, for the first time in history.
The informal relationship established for wartime signals intelligence developed into a formal, signed agreement at the start of the Cold War. [ 15 ] The formal Five Eyes alliance can be traced back to the August 1941 Atlantic Charter , which laid out Allied goals for the post-war world.
GCHQ ran many signals intelligence (SIGINT) monitoring stations abroad. During the early Cold War, the remnants of the British Empire provided a global network of ground stations which were a major contribution to the UKUSA Agreement; the US regarded RAF Little Sai Wan in Hong Kong as the most valuable of these.