12th USASA Field Station

The 12th USASA Field Station was a United States Army Security Agency signals intelligence unit activated in the early 1960s during the Cold War. Stationed primarily in Chitose, Hokkaido, Japan, the unit played a crucial role in intercepting and analyzing communications from the Soviet Union and other regional actors in Northeast Asia. Its personnel operated advanced listening and cryptologic equipment, providing vital intelligence to both the U.S. military and allied forces. The station continued operations until it was redesignated as part of the U.S. Army Intelligence and Security Command in the late 1970s, reflecting changes in military intelligence structure.