 Complete the following phrase:  Beginning in the spring of 1944, the Polish underground was preparing for the Operation Tempest, which was designed to cause a large scale uprising behind the German lines to prevent the Soviet takeover of the territory by establishing a local Polish administration before the Soviets arrival, as a sign to the entire world that the Polish government in exile commanded significant Polish forces. Operation Tempest would also support the Soviet Eastern Front offensive. In June Krzyżanowski and his subordinates prepared the 