SS Oberführer (senior colonel) Ferdinand von Sammern-Frankenegg was the commander of the Warsaw area beginning in 1941, and was in charge of the Aktzia of January 18, 1943, and the first offensive in the Warsaw Ghetto on April 19, 1943. He was replaced by Jurgen Stroop following the unsuccessful morning offensive.
Sammern-Frankenegg was court-martialed on April 24, 1943, and found guilty of defending Jews. After the trial, he was transferred to Croatia and was killin a partisan ambush near the city of Klasznic on September 20, 1943.
Sources: Dor, Danny, Ed. Brave and Desperate. Israel: Ghetto Fighters' House Museum, 2003, p. 166.