This document provides an overview of World War 2, covering major events from the interwar period in the 1920s-1930s through the end of the war. It discusses the failures of the League of Nations and international agreements in the interwar period, the rise of fascism in Germany and Italy, key battles in Europe and the Pacific, major conferences between Allied leaders, the development and use of the atomic bomb against Japan, war crimes trials after the war, and the emergence of the US and USSR as superpowers afterwards.