In 1943 "Związek Mazurski" was reactivated secretly by Masurian activists of the Polish Underground State in Warsaw and led by Karol Małłek. Związek Mazurski opposed Nazi Germany and asked Polish authorities during the war to liquidate German property after victory over Nazi Germany to help in agricultural reform and settlement of Masurian population, Masurians opposed to Nazi Germany requested to remove German heritage sites "regardless of their cultural value". Additionally a Masurian Institute was founded by Masurian activists in Radość near Warsaw in 1943. Andreas Kossert regards these claims as a presumption completely disregarding the actual conditions of the Masurian people.