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.
Secondary Sources are materials that digest, analyze, evaluate and interpret information contained within primary sources or other secondary sources. Examples. 1  Autobiographies, memoirs, diaries, emails, oral histories.  Letters, correspondences, eyewitnesses.
Primary sources and secondary sources. Primary sources are first hand sources. For instance, an inscription on a wall, a painting, interviews, diaries and the like. Whereas, a secondary source is when you obtain information from someone or something else. For instance, a newspaper or a magazine.