In December 1979 Mongolian party and government delegation headed by the Chairman of the Council of Ministers of Mongolia Jambyn Batmunkh visited Laos and had held talks with the leaders of these countries on issues pertinent to the Sino-Vietnamese war of 1979, Chinese aggressive foreign policy in Asia.

Vietnam claims that China has "intensified armed activities" on the Sino-Vietnamese border.

Nguyen Duy Trinh informs the UN Secretary General of China's military maneuvers on the Sino-Vietnamese border.

A Vietnamese Foreign Ministry Report outlining its allegations that China is provoking hostilities on the Sino-Vietnamese border.

The Chinese government reports that "Vietnamese armed personnel encroached upon Chinese border areas on nearly 30 occassions."

Chen Chu announces that "the Vietnamese authorities are pursuing a policy of aggression and expansion abroad."

The Chinese Foreign Ministry accuses Vietnam of sending troops into Yunnnan and Guangxi and attacking Chinese citizens.

The Vietnamese Foreign Ministry reports that Chinese troops have amassed along the Sino-Vietnamese border.

The Vietnamese Foreign Ministry claims that China is violating Vietnamese sovereignty.

Three protest notes from the Chinese government over Vietnam's treatment of Chinese nationals and its suspension of railway traffic between the two countries.