What army was Adolf Hitler the leader of?

The only army/paramilitary force that swore fealty to Hitler was the SS or Schutzstaffel. This was formed as the SA, or Sturmabteilung (also known as the stormtroopers) swore fealty to the NSDAP (Nazi Party), and the Wehrmacht (the German Military) was not a Nazi organization and swore loyalty to Germany -- Hitler knew that the Wehrmacht would overthrow him otherwise.