The Yalta Conference had granted the Soviet Union a predominant interest in Romania, the Paris Peace Treaties did not acknowledge Romania as an allied co-belligerent, as the Romanian army had fought hard against the Soviets for the better part of the war, changing sides only when the tides started to turn. The Communists, as all political parties, played only a minor role in King Michael's first wartime government, headed by General Constantin Sănătescu, though their presence increased in the one led by Nicolae Rădescu. This changed in March 1945, when Dr. Petru Groza of the Ploughmen's Front, a party closely associated with the Communists, became prime minister. His government was broad-based on paper, including members of most major prewar parties except the fascist Iron Guard. However, the Communists held the key ministries, and most of the ministers nominally representing non-Communist parties were, like Groza himself, fellow travelers.