British authorities left South Yemen in November 1967 in the wake of an intense resistance campaign. The People's Democratic Republic of Yemen, the successor to British colonial rule, had diplomatic relations with many nations, but its major links were with the Soviet Union and other Communist countries. Relations between it and the conservative Arab states of the Arabian Peninsula were strained. There were military clashes with Saudi Arabia in 1969 and 1973, and the PDRY provided active support for the Dhofar Rebellion against the Sultanate of Oman. The PDRY was the only Arab state to vote against admitting new Arab states from the Persian Gulf area to the United Nations and the Arab League. The PDRY provided sanctuary and material support to various international terrorist groups.