Hitler introduced many policies and measures to ensure the Nazis remained in control, once he declared himself Führer. These measures dealt with political opponents, as well as ordinary people, who suddenly found their private, social and working lives controlled by the Nazis.
Measure the gas around it
One of the main reasons why primary sources are valuable to historians is because "<span>They give insight into the thoughts and feelings of a participant in history," since these are sources that originated during the time in question, and are "unaltered". </span>