Sino-Soviet refers to the relationship between China (Sino) and the Soviet Union (Soviet) during the Cold War era. It specifically refers to the political, economic, and military interactions between the two communist countries from the 1940s to the 1980s. Initially, the Sino-Soviet relationship was characterized by cooperation and mutual support, as both countries shared a common ideology and sought to spread communism worldwide. However, ideological and strategic differences emerged over time, leading to tensions and eventually a complete breakdown in relations in the late 1960s. The Sino-Soviet split had significant implications for the global balance of power during the Cold War and reshaped the dynamics of international communism.