Definition of night of the long knives in English English dictionary
(June 30, 1934) Purge of Nazi leaders by Adolf Hitler. Fearing that the paramilitary SA had become too powerful, Hitler ordered his elite SS guards to murder the organization's leaders, including Ernst Röhm. Also killed that night were hundreds of other perceived opponents of Hitler, including Kurt von Schleicher and Gregor Strasser
murderous weekend in 1934 when Hitler killed and "purified" those people who stood in his path