Munich (Beer Hall) Putsch - Hitler and the NSDP attempt to overthrow the Bavarian government failed. The leaders were arrested and charged with treason
In 1924 a pay plan for Germany was set up and the United States started giving out national loans to other countries which created more stable economies yet made the other countries dependent on the United States.
Philosophers during the Weimar Republic pursued paths of enquiry into mathematics and physics. The leading scientists became known as the Berlin Circle, who analyzed philosophical and logical consequences of the advances in contemporary physics.
Hitler annexed Austria, which voted 99% in favor of being absorbed into Germany. This consolidation blatantly violated the peace treaty that ended WWI, but the Allies lacked the will to prevent it.