Doe closed the Libyan mission in Monrovia and severed diplomatic relations with the Soviet Union .
Liberia protected important U.S. facilities and investments in Africa , and countered the threatened spread of Soviet influence in the continent .
Doe closed the Libyan mission in Monrovia and severed diplomatic relations with the Soviet   .
Liberia protected important U.S. facilities and investments in Africa , and countered the threatened spread of Soviet influence in the continent .