The self-defense counterattack war against Vietnam refers to the war between the People's Republic of China and the Socialist Republic of Vietnam between February 17 and March 16, 1979. The following are the reasons for the self-defense counterattack against Vietnam:
1.Deterioration of Sino-Vietnamese relations: In the mid-70s of the 20th century, after Vietnam ended the War of Resistance against the United States and achieved national reunification, it regarded China as its "number one enemy", and Sino-Vietnamese relations deteriorated sharply.
2.Territorial disputes and border conflicts: China and Vietnam have territorial disputes and border conflicts, especially in the Sino-Vietnamese border areas. These controversies and conflicts have led to an escalation of tensions.
3.Vietnamese invasion of Cambodia: The immediate trigger was Vietnam's invasion of Cambodia and the overthrow of the China-leaning Khmer Rouge regime. China believes that Vietnam's actions threaten China's security and interests, so it has decided to retaliate in self-defense.
4.Sino-Soviet Relations and Soviet Interference: The deterioration of Sino-Soviet relations was also one of the reasons for the self-defense counterattack against Vietnam. The Soviet Union supported Vietnam and tried to promote a collective security system in Asia, which further increased tensions between China and Vietnam.
In general, the reasons for the self-defense counterattack war against Vietnam were manifold, including the deterioration of Sino-Vietnamese relations, territorial disputes and border conflicts, Vietnam's invasion of Cambodia, and the hostility between China and the Soviet Union and the interference of the Soviet Union.