World War III is a hypothetical future global conflict that would follow World War I and World War II. It is widely believed that such a war would involve the great powers and likely include nuclear weapons or other weapons of mass destruction, resulting in unparalleled devastation and loss of life. The term has been used historically to describe potential escalation scenarios during the Cold War, especially between the US-led Western Bloc and Soviet-led Eastern Bloc, with many close calls such as the Cuban Missile Crisis and the 1983 Able Archer exercise. Since then, the idea of World War III remains a subject of speculation, war gaming, and concern among military and political experts, particularly in the context of modern geopolitical tensions like those involving Russia and NATO in Eastern Europe.