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.
Characteristics of Primary Sources Primary sources can either be first-hand observation/analysis, or accounts contemporary with the events described. Primary sources document events, people, viewpoints of the time. When research is more era, rather than event driven, scope of possible primary sources broadens considerably. Primary sources represent one person's perspective; frequently will be used with secondary/tertiary sources to broaden the lens through which a researcher is looking at an event, era, or phenomenon.