Following the start of the
Second World War, as an aide to
Erich von dem Bach Zelewski, Wigand first suggested the site in
Upper Silesia of the former Austrian and later Polish artillery barracks in the Zasole suburb of
Oswiecim for a concentration camp in January 1940. This site would evolve into the
Auschwitz concentration camp which went on to become a major site of the Nazi "
Final Solution to the Jewish question" resulting in the death of up to 1,000,000 Jews. On 4 August 1941, Wigand was appointed
SS and Police Leader (SSPF) in
Warsaw. In mid-October 1941, at a meeting in Warsaw, he expressed the opinion that the Jews in the
Warsaw Ghetto were incapable of resistance due to their poor nutritional status. Wigand was entrusted by
Heinrich Himmler on 17 April 1942, with the construction of the
Treblinka extermination camp. In July 1942, Wigand transferred to the
Waffen-SS and his duties as SSPF in Warsaw were assumed by
Ferdinand von Sammern-Frankenegg in an acting capacity, until he was formally replaced as SSPF by
Jürgen Stroop on 23 April 1943. In the Waffen-SS, Wigand served as a platoon leader with the
7th SS Volunteer Mountain Division Prinz Eugen from September 1942, then as an adjutant with the same division from spring 1943, and finally as commander of the 3rd battalion of the
13th Waffen Mountain Division of the SS Handschar (1st Croatian) until February 1945. During his war service, Wigand was awarded the
Iron Cross, 1st and 2nd class and the
War Merit Cross, 2nd class. ==Trial and conviction==