jun 30, 1934 - Night of the long knives
Many members of the SA, including its leader Ernst Röhm, were demanding that the Nazi party carry out its socialist agenda and that the SA take over the army. Hitler could not afford to annoy businessmen or the army, so the SS (Hitler's personal bodyguards) murdered around 400 members of the SA, including Röhm, along with a number of Hitler's other opponents like the previous Chancellor, von Schleicher.
Added to timeline:
Nazi Germany timeline