Simplify the following text for a Grade 8 native English-speaking person.
Original: He was appointed head of the Propaganda Ministry by Nazi FÃ 1\/4 hrer Adolf Hitler in his political testament after Dr. Goebbels was promoted to Reichskanzler .
Simplified: He was appointed head of the Propaganda Ministry by Hitler in his political testament . This was because Dr. Goebbels was promoted to be the Chancellor of Germany .