Sentence:  His clever work is now bearing fruit with recognition by the United States in the offing and other major nations may be expected to follow suit. He is entitled to a pat on the back by Mr. Stalin. Naturally, pre-Soviet and <WSD>post-Soviet</WSD> debts will be discussed. President Roosevelt has naively suggested that we would like to slide down Russia's cellar door and play in the Soviet backyard. He is thinking, doubtless [...] of Russian markets [...] 
Meaning of the word marked with <WSD> tags:  After the formation of the Soviet Union.