A particularly difficult target for the U.S. Air Force was the Thanh Hoa Bridge, a well-defended combined road/rail bridge in Thanh Hoa Province, which was attacked several times from 1965 to 1972.
A particularly difficult target for the U.S. Air Force was the Thanh Hoa Bridge-defended combined road/rail bridge in Thanh Hoa Province. The Thanh Hoa Bridge was a well. Thanh Hoa Province was attacked several times from 1965 to 1972.