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.
A secondary source is one that gives information about a primary source. These sources contain second hand information that has already appeared in primary documents. In this source, the original information is selected, modified and arranged in a suitable format for the purpose of easy location by the users.