What were some of the major events leading up to the halocaust

One of them would be the Beer Hall Putsch, an event in which members of the NSDAP or 3rd Reich Nazi party marched to get some important members of the Weimar Republic to side with them so they could spread influence for the NSDAP. At the time there were other parties, such as the Communist party attempting to gain power as well, this is due to the fact that the Weimar Republic was weaker in the case of political power.

They made a checks and balance system to equal power within the branches. the "check" meant that one branch would watch one branch and "balance" them if they were too powerful. if you want more info on this, i would just google checks and balance system.