Although Germany was now a one party state, Hitler still feared opposition within his own party, in particular from Ernst Rohm, leader of the SA.
By 1934, the SA numbered 3 million, and Hitler feared many of these were loyal more to Rohm than himself, who was more socialist than Hitler.
Rohm was also distrusted by the army generals, whose limited army of 100,000 was threatened by the 3 million strong SA, and by other Nazi leaders such as Heinrich Himmler and Hermann Goring who saw Rohm’s influence as a threat to their status in the Party. Himmler wanted his SS to replace the SA in importance.
Hitler believed that Rohm was planning to use the SA to seize power, so on 30 June 1934, Rohm and 100 other senior SA leaders were arrested at a meeting in Bavaria and shot without trial.
The SA continued to exist but no longer rivalled the army or the SS and was now firmly under Hitler’s control.
Hitler also used the opportunity to have other potential political opponents murdered in the carnage, including Gregor Strasser who had challenged Hitler’s leadership of the Party at the Bamberg Conference.