This document discusses several proxy wars that occurred between major world powers during the Cold War era. It provides brief summaries of the Greek Civil War, Korean War, Vietnam War, Bay of Pigs Invasion, Chilean Coup d'état, Angolan Civil War, and war in Afghanistan. In each conflict, one side received support from either the United States or Soviet Union while the opposing side was backed by the other superpower. The outcomes and impacts on spheres of influence varied, but generally increased tensions between the US and USSR.