Who was the leader of Nazi Germany during World War II?

The leader of Nazi Germany during World War II was Adolf Hitler. He rose to power as Chancellor of Germany in 1933 and later assumed the title of Führer, consolidating control over the German state and promoting a totalitarian regime. Hitler's aggressive expansionist policies and ideologies, characterized by extreme nationalism and anti-Semitism, were pivotal in igniting World War II when Germany invaded Poland in 1939. His leadership saw the implementation of the Holocaust, the systematic extermination of millions, and the reshaping of Europe through military conquest.

Understanding Hitler's role is crucial to comprehending the causes of the war, the nature of the Nazi regime, and the profound impact it had on the global order during the 20th century. The other figures mentioned, such as Joseph Stalin, Benito Mussolini, and Hirohito, played significant roles in their respective countries during this period, but it was Hitler who was at the helm of Nazi Germany and directly responsible for many of the war's most catastrophic events.