The SA, led by Rohm, was purged during “The Night of the Long Knives,” and renamed the SS.
The SA and SS were actually separate groups existing at the same time. The SS began as Hitler’s personal guard and expanded greatly, into overseers of mass murder and elite combat units notorious for gross atrocities, after the SA was disbanded and its homosexual clique leadership slaughtered. The jealousy and competition among the criminals and psychopaths who made up the Nazi hierarchy were intense. Himmler vs. Röhm, was just one example.