After the dissolution of the duchy in 1675, the town became part of Habsburg-ruled Bohemia, in the 18th century it was annexed by the Kingdom of Prussia. With the Prussian-led Unification of Germany, it became part of Germany in 1871 and was located in the Guhrau district in the Prussian Province of Silesia and later in the Province of Lower Silesia. During World War II, in 1943, the Germans established a camp for Polish children up to 5 years of age, who were deemed "racially worthless", and whose mothers were deported to forced labour camps in Lower Silesia.[5] At least 485 Polish children passed through the camp, and due to its terrible sanitary conditions many died and the bodies were transported in wheelbarrows to the local cemetery.[5] Only 39 children survived until the liberation of the camp.[5] Local pastor Paul Tillmann rescued these children when, during the German evacuation the camp, he opposed the idea of blowing up the building with the children, and looked after them until the town was liberated.[5] Towards the end of the war, the town was captured by the Soviet Red Army, and then became again part of Poland.
Plaque from 1960 commemorating the 1000th anniversary of Poland, 670th anniversary of Wąsosz and the 15th anniversary of Poland's recovery of Lower Silesia