What accurately describes events during the World War 2?

World War II, which lasted from 1939 to 1945, involved major global powers divided into two main alliances: the Allies and the Axis. The war began with Germany's invasion of Poland, prompting Britain and France to declare war. Key events included the Holocaust, the use of atomic bombs on Hiroshima and Nagasaki, and significant battles like Stalingrad and D-Day. The conflict resulted in an estimated 70-85 million fatalities and led to significant geopolitical changes, including the establishment of the United Nations and the onset of the Cold War.