[4] When the Eastern Front of World War II grew closer to the city, Gauleiter Erich Koch prevented[5] Gause from transferring the works under his responsibility to a safer location.
While serving as chairman, he established the Haus Königsberg, a historical and cultural museum which opened on 20 October 1968 in Duisburg.
[6][7] In the same publication – 'Deutsch-slawische Schicksalsgemeinschaft' – he ignored all objective German historians as well as Polish ones and used as sources known supporters of Nazi Germany and Hitler, while defending Prussia's actions against Poland and showing as the main villain USA's president Wilson.
[8] While objecting to Hitler's policies, he showed Nazi demands as morally justified; his efforts to paint Nazism as just another form of "Prussian militarism" were described as "amusing denial", but understandable in view of the author's open admiration of "Prussian spirit."
[12] In his other works he praised Partitions of Poland as progressive act and claimed that Germany brought the "Slavic East" into European civilization.