What is Adolf Hitler claim to fame?

Adolf Hitler is primarily known for being the leader of Nazi Germany from 1934 to 1945 and for instigating World War II by invading Poland in 1939. His regime is infamous for its role in the Holocaust, which resulted in the systematic genocide of six million Jews and millions of others deemed undesirable. Hitler's totalitarian governance and aggressive expansionist policies led to widespread devastation across Europe and significant loss of life. His actions and ideology have left a lasting impact on history and serve as a cautionary tale about the dangers of totalitarianism and extreme nationalism.