I want to know the answer to the following question:
Who did the Ukrainian Bolsheviks conquer the Ukraine from?
All the background I'm provided with is that "After conquering the rest of Ukraine from the Whites, Ukraine joined the USSR and was enlarged (gaining Crimea and then Eastern Galicia), whence a process of Ukrainization was begun, with encouragement from Moscow.". Is that enough to answer the question?
Answer: yes