17 July – Altona Bloody Sunday: In Altona, clashes break out between the police, Nazi SA members and Communist party supporters during a National Socialist demonstration; 18 are killed. Many other political street fights follow.[4]
31 July – Federal election: The Nazi Party gains a plurality and the Communists also gain seats. This creates a "negative majority" that prevents any majority coalition that does not include one of the two parties.
6 November – Federal election: The Nazis lose many seats, but retain the plurality as the Communists continue to gain. (This is the last free and fair election held throughout East-Germany until 1990.)
21 November – President Hindenburg begins negotiations with Adolf Hitler about the formation of a new government.
^Overy, R. J. (1996). The Penguin historical atlas of the Third Reich. London New York: Penguin Books Ltd. Penguin Books USA Inc. p. 117. ISBN9780140513301.
^Patch, William (2006). Heinrich Brüning and the dissolution of the Weimar Republic. Cambridge, UK New York: Cambridge University Press. p. 258. ISBN9780521025416.
^Eyck, Erich (1956). Geschichte der Weimarer Republik. Zweiter Band: Von der Konferenz von Locarno bis zu Hitlers Machtübernahme. 2. Aufl. [History of the Weimar Republic. Second volume: From the Locarno Conference to Hitler's seizure of power. 2nd ed.] (in German). Erlenbach-Zürich / Stuttgart: Eugen Rentsch Verlag. p. 502.
^Hamburg im Dritten Reich [Hamburg in the Third Reich] (in German). Göttingen: Forschungsstelle für Zeitgeschichte in Hamburg [Center for Contemporary History in Hamburg]. 2005. p. 53.
^Lesch JE (2007). "Chapter 3: Prontosil". The first miracle drugs: how the sulfa drugs transformed medicine. Oxford University Press. p. 51. ISBN978-0-19-518775-5.
^Who's who in European Institutions and Organizations. Who's Who The International Red Series Verlag. 1982. p. 22.