 Complete the following phrase:  In early 1943, the Home Army built up its forces in preparation for a national uprising. The situation was soon complicated by the continuing strength of Germany and the threat presented by the advance of the Soviets, who promoted a territorial and political vision of a future Poland that was at odds with what the Polish leaders were striving for. The Council of National Unity, a quasi-parliament, was instituted in occupied Poland on 9 January 1944; it was chaired by Kazimierz Pużak, a socialist. The plan for the establishment of Polish state authority ahead of the arrival of the Soviets was code-named Operation Tempest and began in late 1943. Its major implemented elements were the campaign of the 27th Home Army Infantry Division in Volhynia from February 1944, 