Which country assisted cuba with their revolution and why?

The Soviet Union played a significant role in assisting Cuba during its revolution, particularly after Fidel Castro's successful overthrow of the Batista regime in 1959. The USSR provided military, economic, and political support, driven by the desire to expand its influence in the Western Hemisphere during the Cold War and to establish a socialist state close to the United States. This alliance helped Cuba develop its economy and military while also solidifying the Soviet Union's presence in the region.