The Sino-Soviet border conflict (中苏边界冲突) was a seven-month military conflict between the Soviet Union and China at the height of the Sino-Soviet split in 1969. The most serious of these border clashes occurred in March 1969 in the vicinity of Zhenbao Island (珍宝岛) on the Ussuri River, also known as Damanskii Island (Остров Даманский) in Russia. Chinese historians most commonly refer to the conflict as the Zhenbao Island incident (珍宝岛自卫反击战) The conflict was finally resolved with future border demarcations.