The document outlines the major events and geopolitical shifts from the end of World War II to the rise of the Cold War, highlighting the division of power between the United States and the Soviet Union. Key developments include the establishment of the United Nations, the decolonization of several countries, the ideological conflict over communism versus capitalism, and the technological advancements in warfare. The division of post-war Europe and the influence of the 'big three' allied leaders are discussed as critical factors shaping the ongoing tensions of the Cold War era.