The Weimar Republic was established in Germany in 1919 after the Kaiser fled following World War I. It aimed to create a democratic government but faced significant challenges from right-wing groups who believed Germany was betrayed in the war. Paramilitary groups like the Freikorps and left-wing groups like the Spartacists engaged in revolts and uprisings that destabilized the new republic. In the early 1920s, France occupied Germany's industrial Ruhr region, crippling the economy and leading to hyperinflation until a new Chancellor, Gustav Stresemann, stabilized the currency and economy in 1923.