Keiser Fled before the end of WW1, a new Democratic Republic was set up. The system used was Proportional Representation; this was a problem as there were over 35 separate parties that were unable to gain a majority Vote- this lead to a series of short ruling coalition governments.
Following the signing of the Treaty of Versailles, the German economy was in ruins. They had lost money due to reparations and their industry was limited. Goods became expensive. The government printed more money in a vein attempt to recover the economy. This prompted inflation. The loss of merchant ships lead to a massive rise in unemployment. This lead to Political Unrest.
The Spartacist Revolt was a communist uprising by the working class. They hated the middle classes as they had jobs and money, they wished for the wealth to be shared out. The revolt was crushed violently by the Frei Korps.
The Kapp Putch was the left wing uprising that followed the communist one. They marched on Berlin, in return, there was a general strike in Berlin that prevented them from doing anything and the Putch failed.
Inflation Worsened and the Ruhr was occupied by the French when Germany failed to pay the second reparations instalment. Passive resistance followed. Hyper-inflation followed as the government printed more money to pay the French and the middle classes lost all of their savings as money was worthless.
The Munich Putch was the Nazi attempt to get into power at this time of unrest. The Putch failed and Hitler was sent to jail.