The Schutzstaffel ( Schutzstaffel (info • help) (SS) or better known as the SS was a large security and military organization controlled by the National Socialist German Workers Party (Nazi Party) in Germany. "SS" was sometimes written in Runic as , and this symbol was put on the SS flag and insignia. It was formed in 1925 in Weimar Germany or better known as the Weimar Republic . In 1934 the SS became powerful after the execution of the head of the Sturmabteilung (SA) leader Ernst Röhm in Night of the Long Knives .