The Zhenbao Island counter-attack in self-defence was made by Chinese frontier guards in March 1969 to repulse Soviet troops intruding into China's Zhenbao Island, Heilongjiang Province. The Xisha Islands counter-attack in self-defence was made by the Chinese People's Liberation Army jointly with Chinese militiamen and fishermen in January 1974 on troops of the now defunct Saigon regime of south Viet Nam, who were invading China's Xisha Islands. The counter-attack in self-defence along the Sino-Indian borders was waged on India's invading troops, an operation by Chinese frontier guards in October 1962 to safeguard China's territorial sovereignty.