What groups and organizations was Adolf Hitler involved in? I need to know for a history assignment, and every time I try to google it, it comes...

Hitler was a member of many groups throughout his life, he also avoided or was barred from entering several organisations.

The Vienna Academy of Fine Arts rejected his membership in 1907 and 1908 due to he being 'unfit as a painter'. His secondary school results (or lack thereof) meant that he couldn't enter the Academy as an architect either.

Hitler left Vienna for Munich in 1913, partly to avoid conscription into the Austrian Army.

He volunteered to serve in the Bavarian Army in World War One. He served as a dispatch runner for the Bavarian Reserve Infantry Regiment 16.

After the War, he was appointed an intelligence officer in the Reichswehr and became a member of the German Workers' Party (DAP). The Party then changed its name to Nationalsozialistische Deutsche Arbeiterpartei (National Socialist German Workers Party, "Nazi Party").