Adolf Hitler was a German politician and leader of the National Socialist German Workers' Party (Nazi Party). He rose to power as Chancellor of Germany in 1933 and later Führer in 1934, leading the country into World War II and orchestrating the Holocaust, which resulted in the deaths of millions. Hitler's aggressive expansionist policies and totalitarian regime had a profound impact on Europe and the world. His ideology promoted Aryan supremacy and anti-Semitism, leading to widespread atrocities. Hitler's reign ended in 1945 when he died by suicide as Allied forces closed in on Berlin.