Königsberg, the capital city of East Prussia, was surrounded by the Soviets in late January 1945 and besieged, although the seaside was still open and usable by the Germans. Since the frontline quickly moved further west in February, the capture of the city was of low priority to the Soviets, and so the Soviet attack on the city only started on April 6th, and on April 9th, with the Soviets already in the city, the German defenders capitulated.
Otto Lasch (1893-1971) was functioned as Commandant of Königsberg in East Prussia from November 1944 onward. As Fortress Commandant of Königsberg he was responsible for defending the city and maintaining order among the flood of refugees fleeing from the advancing Red Army. Following heavy fighting and a three month siege of the city during the Battle of Königsberg by the 36-division-strong 3rd Byelorussian Front under Ivan Chernyakhovsky, Lasch disobeyed Hitler's orders and surrendered Königsberg to the Red Army on 9 April 1945. As a result of his surrender Hitler sentenced him in absentia to death by hanging, and his family, in Denmark and Berlin at the time, was arrested. Lasch went into Soviet captivity and was convicted as a war criminal in the Soviet Union and sentenced to twenty-five years in a corrective labor camp. He was released in 1955.
Source :
Die Deutsche Wochenschau No. 755 - 22 March 1945
https://www.youtube.com/watch?v=jWxWY4rFhTg
https://en.wikipedia.org/wiki/Otto_Lasch























