Germany loses WWI, and the Treaty of Versailles is signed. Many Germans consider this a 'Stab in the Back'
Due to the treaty being signed, Germany faced many consequences, many of which they were not prepared for, therefore leading to a crises year in 1923 with the invasion of the Ruhr, Hyperinflation, and the Munich putsch...
The Munich putsch was when Hitler and General Ludendorff attempt to overthrow the Wiemar republic, but it was not successful as the German army stopped them and started firing. Even though the putsch itself failed, Hitler considered it a success as it opened up the eyes of many Germans that soon became his followers.
The following years, from 1924-1929 were considered the 'golden years' after Gustav Stresemann takes over. He was a nationalist, and solved many of Germany's problems. However, in 1929, the stock market crashed and the whole world went into an economic depression.
The great depression left many Germans, unemployed and bankrupt. The government was disagreeing, and many were starting to question the effectiveness of the government itself. With many people unemployed, hungry & desperate, they turned to the extremist parties for solutions.
Hitler used this opportunity to use propaganda so that he could gain support. From 1924 to 1932, the Nazi's votes increased by 26.6%, and Hitler was elected chancellor in 1933.