7th Radio Research Field Station

The 7th Radio Research Field Station (7th RRFS) was a United States Army signals intelligence unit based at Ramasun Station near Udorn Thani, Thailand, during the Vietnam War. Activated in the mid-1960s, the unit played a crucial role in intercepting and analyzing enemy communications, providing timely intelligence to U.S. and allied forces in Southeast Asia. The 7th RRFS operated advanced electronic equipment and worked closely with other branches of the U.S. military and intelligence agencies. The station remained active until the U.S. drawdown in the region, officially ceasing operations in the mid-1970s.