The SA (Sturmabteilung) was not eliminated only its senior members were murdered or jailed.
On 29th June, 1934. Hitler, accompanied by the Schutzstaffel (SS), arrived at Wiesse, where he personally placed Ernst Röhm and other high-ranking SA leaders under arrest. During the next 24 hours 200 other senior SA officers were arrested on the way to Wiesse. Many were shot as soon as they were captured
After the Night of the Long Knives, the SA continued to exist under the leadership of Victor Lutze, but the group was large placated and significantly downsized. The SA became overshadowed by other Nazi groups in the coming years, chiefly the SS, and by 1938 had little remaining significance in the Nazi organization.
With the start of World War II in 1939, the SA lost most of its remaining members to the draft, although an attempt was made to form an SA division on similar lines to the Waffen-SS, the result being the creation of the Feldherrnhalle SA-Panzer Division.
In 1943, Victor Lutz was killed in an automobile accident and leadership of the group was assumed by Wilhelm Schepmann. Schepmann did his best to run the SA for the remainder of the war, attempting to restore the group as a predominant force within the Nazi Party and to mend years of distrust and bad feelings between the SA and SS.
The SA officially ceased to exist in May of 1945 when Nazi Germany collapsed.
The SS was a different organization then the SA and was created originally as a bodyguard unit for Hitler and after the night of the long knives it took over many of the function that the SA did. The SS originally were developed to answer directly to Hitler. The SA originally functioned as a paramilitary organization of the Nazi Party. It played a key role in Adolf Hitler's rise to power in the 1920s and 1930s but it was independent in many ways from Hitler.
Other senior Nazi members were concerned about the independence and influence that the SA and its leadership had. Blomberg and von Reichenau two German army generals began to conspire with Hermann Göring and Heinrich Himmler against Röhm and the SA. Himmler asked Reinhard Heydrich to assemble a dossier on Röhm. Heydrich recognized that in order for the SS to fully gain national power the SA had to be broken.He manufactured evidence that suggested that Röhm had been paid 12 million marks by the French to overthrow Hitler.
The elimination of the members had more to do with an internal struggle for power then a real threat to the Nazis.