Piotr Wilniewczyc (dob) was a Polish engineer and arms designer. Among his most successful designs were the Vis-35 pistol, commonly known as the Radom for the arsenal in which it was produced, and the Mors sub-machine gun. During the war, Wilniewczyc worked with the Home Army in Warsaw, developing a silencer for the Sten gun.
SS Einsatzgruppe A reported a tally of 229,052 Jews killed (location unknown). Einsatzgruppen were squads composed primarily of German SS and police personnel. Under the command of the German Security Police (Sicherheitspolizei; Sipo) and Security Service (Sicherheitsdienst; SD) officers, the Einsatzgruppen had among their tasks the murder of those perceived to be racial or political enemies found behind German combat lines in the occupied Soviet Union. Victims included Jews, Roma (Gypsies), and officials of the Soviet state and the Soviet Communist party. The Einsatzgruppen also murdered thousands of residents of institutions for the mentally and physically disabled. At first the Einsatzgruppen shot primarily Jewish men. By late summer 1941, however, wherever the Einsatzgruppen went, they shot Jewish men, women, and children without regard for age or sex, and buried them in mass graves. Often with the help of local informants and interpreters, Jews in a given locality were identified and taken to collection points. Thereafter they were marched or transported by truck to the execution site, where trenches had been prepared. In some cases the captive victims had to dig their own graves. After the victims had handed over their valuables and undressed, men, women, and children were shot, either standing before the open trench, or lying face down in the prepared pit.