Adolf Hitler yang lahir 20 April 1889 – 30 April 1945 adalah seorang politisi Jerman dan ketua Partai Nazi kelahiran Austria. Ia menjabat sebagai Kanselir Jerman sejak 1933 sampai 1945 dan diktator Jerman Nazi (bergelar Führer und Reichskanzler) mulai tahun 1934 sampai 1945. Hitler menjadi tokoh utama Jerman Nazi, Perang Dunia II di Eropa, dan Holocaust. Hitler adalah veteran Perang Dunia I dengan banyak gelar. Ia bergabung dengan Partai Pekerja Jerman (pendahulu NSDAP) pada tahun 1919, dan menjadi ketua NSDAP tahun 1921. Tahun 1923, ia melancarkan kudeta di Munich yang dikenal dengan peristiwa Beer Hall Putsch. Kudeta yang gagal tersebut berujung dengan ditahannya Hitler. Di penjara, Hitler menulis memoarnya, Mein Kampf (Perjuanganku). Setelah bebas tahun 1924, Hitler mendapat dukungan rakyat dengan mengecam Perjanjian Versailles dan menjunjung Pan-Jermanisme, antisemitisme, dan anti-komunisme melalui pidatonya yang karismatik dan propaganda Nazi. Setelah ditunjuk sebagai kanselir pada tahun 1933, ia mengubah Republik Weimar menjadi Reich Ketiga, sebuah kediktatoran satu partai yang didasarkan pada ideologi Nazisme yang totalitarian dan otokratik. Tujuan Hitler adalah mendirikan Orde Baru hegemoni Jerman Nazi yang absolut di daratan Eropa. Sampai saat itu, kebijakan luar dan dalam negerinya bertujuan mencapai Lebensraum ("ruang hidup") bagi kaum Jermanik. Ia memerintahkan Jerman dipersenjatai kembali dan Wehrmacht menginvasi Polandia pada bulan September 1939, menyebabkan pecahnya Perang Dunia II di Eropa.
Di bawah pemerintahan Hitler, pada tahun 1941 pasukan Jerman dan sekutu Eropanya menduduki sebagian besar Eropa dan Afrika Utara. Tahun 1943, Jerman terpaksa bertahan diri dan mengalami serangkaian kekalahan dalam pertempuran. Pada hari-hari terakhir perang, saat Pertempuran Berlin berlangsung tahun 1945, Hitler menikahi kekasih lamanya, Eva Braun. Tanggal 30 April 1945, kurang dari dua hari kemudian, keduanya bunuh diri agar tidak ditangkap Angkatan Darat Merah, lalu mayat mereka dibakar. Kebijakan Hitler yang supremasis dan termotivasi oleh ras mengakibatkan kematian sekitar 50 juta orang selama Perang Dunia II, termasuk 6 juta kaum Yahudi dan 5 juta etnis "non-Arya" yang pemusnahan sistematisnya diperintahkan oleh Hitler dan rekan-rekan terdekatnya.
Adolf Hitler (German: 20 April 1889 – 30 April 1945) was an Austrian-born German politician and the leader of the Nazi Party (German: Nationalsozialistische Deutsche Arbeiterpartei (NSDAP); National Socialist German Workers Party). He was chancellor of Germany from 1933 to 1945 and dictator of Nazi Germany (as Führer und Reichskanzler) from 1934 to 1945. Hitler was at the centre of Nazi Germany, World War II in Europe, and the Holocaust. Hitler was a decorated veteran of World War I. He joined the German Workers' Party (precursor of the NSDAP) in 1919, and became leader of the NSDAP in 1921. In 1923, he attempted a coup in Munich to seize power. The failed coup resulted in Hitler's imprisonment, during which time he wrote his memoir, Mein Kampf (My Struggle). After his release in 1924, Hitler gained popular support by attacking the Treaty of Versailles and promoting Pan-Germanism, antisemitism, and anti-communism with charismatic oratory and Nazi propaganda. Hitler frequently denounced international capitalism and communism as being part of a Jewish conspiracy.Hitler's Nazi Party became the largest elected party in the German Reichstag, leading to his appointment as chancellor in 1933. Following fresh elections won by his coalition, the Reichstag passed the Enabling Act, which began the process of transforming the Weimar Republic into the Third Reich, a single-party dictatorship based on the totalitarian and autocratic ideology of National Socialism. Hitler aimed to eliminate Jews from Germany and establish a New Order to counter what he saw as the injustice of the post-World War I international order dominated by Britain and France. His first six years in power resulted in rapid economic recovery from the Great Depression, the denunciation of restrictions imposed on Germany after World War I, and the annexation of territories that were home to millions of ethnic Germans, actions which gave him significant popular support.
Hitler actively sought Lebensraum ("living space") for the German people. His aggressive foreign policy is considered to be the primary cause of the outbreak of World War II in Europe. He directed large-scale rearmament and on 1 September 1939 invaded Poland, resulting in British and French declarations of war on Germany. In June 1941, Hitler ordered an invasion of the Soviet Union. By the end of 1941 German forces and their European allies occupied most of Europe and North Africa. Failure to defeat the Soviets and the entry of the United States into the war forced Germany onto the defensive and it suffered a series of escalating defeats. In the final days of the war, during the Battle of Berlin in 1945, Hitler married his long-time lover, Eva Braun. On 30 April 1945, less than two days later, the two committed suicide to avoid capture by the Red Army, and their corpses were burned. Under Hitler's leadership and racially motivated ideology, the regime was responsible for the genocide of at least 5.5 million Jews, and millions of other victims whom he and his followers deemed racially inferior.
