One hundred years ago this week a revolt among sailors who refused orders for a sneak attack lit the fuse that brought down the German Empire and started the revolution:
https://www.thelocal.de/20151030/the-sailors-who-brought-down-the-german...
I saw a great interview on German TV this week with historian Mark Jones talking about how the cycle of violence in Germany did not start with the Nazis, but with the putting down of a virtually bloodless revolution in 1919, four months after the uprising. The first shots were fired in early December. Weimar was born with a decision to have Freikorp soldiers fire on civilians. Over 12,000 died before the revolution was finally suppressed, and throughout its tenure Weimar promoted the anti-communist and anti-Slavic rhetoric that would later be taken up by the Nazis.
Jones' book on the revolution was written in English, though the German title: "In the beginning was violence" is more to the point.
https://www.history.ac.uk/reviews/review/2070