The end of the Second World War culminated with the beginning of the Cold War which witnessed geopolitical tensions between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The conflict was more ideological and it did not involve direct military conflict between the two main adversaries – hence, it was termed the ‘Cold War’. Instead of direct military confrontation, the superpowers often supported opposing sides in conflicts around the world, leading to proxy wars in places like Korea, Vietnam, Afghanistan, and Central America. On one hand, the end of the war brought about a series of arms reduction treaties and agreements between the United States and Russia (formerly the Soviet Union) that were primarily aimed at reducing the nuclear arsenals of both superpowers; on the other, new security challenges emerged, including non-state actors engaged in terrorism, cyber warfare, and the proliferation of weapons of mass destruction.