 In Ruzhyn, Cossacks entered the heder, throwing the students out into the street.The Germans, violating their own treaty with the Soviet Union (the Molotov-Ribbentrop Agreement), invaded the USSR in 1941.On July 17 the German army seized Ruzhyn, intending to preserve the kolkhoz system – merely diverting the collected produce from its intended destination in Moscow to its own warehouses.