Yes, Romania was part of the Soviet Union, the years 1944 to August 1958, when the Soviet Union kept a strong military presence in Romania, are referred to as the Soviet occupation of Romania.The Soviet Union released Romania from its satellite status in the 1960s with the de-satellization of the Socialist Republic of Romania. Part of the de-satellization was accomplished by the Romanian leadership by capitalising on Nikita Khrushchev's mistakes and frailties.