Viktor Lutze became commander of the Sturmabteilung after succeeding a man who was executed in what event?
Viktor Lutze: Viktor Lutze (28 December 1890 – 2 May 1943) was the commander of the "Sturmabteilung"  ("SA") succeeding Ernst Röhm as "Stabschef". Ernst Röhm:  By 1934, the German Army feared the SA's influence and Hitler had come to see Röhm as a potential rival, so he was executed during the Night of the Long Knives.
Night of the Long Knives