The Treaty of Versailles in the mind of the Germans stabbed them in the back, especially the guilt clause that made them take blame for the First World War. Hitler capaitalized on these sentiments and used them to rally the German people.
Primary sources are the first hand evidence left behind by participants or observers at the time of events. Primary sources originate in the time period that historians are studying. They vary a great deal.
Now I'm sure you're wondering why I've told you all this before I explain the differences between primary and secondary sources. I promise, there is a reason. For every source you use, you will need to think of the questions above to determine which category they fit into - primary or secondary - and how much you can trust what they say. Primary Sources. Primary sources are informational sources from the time of the event. Examples of primary sources: Autobiographies; Diaries