This is a concept that I have seen mentioned in several scenarios, including For All Time, but I do not think that I have seen anyone get into the specifics of what this would entail. So... let's get into specifics!
Let's say that, at some point in the middle to latter part of the 1940s, the Soviet territorial claims against Turkey lead to a war between the two powers. The conflict ends in a crushing Soviet victory: the Armenian SSR and Georgian SSR expand at Turkey's expense, Thrace is ceded to Bulgaria (or perhaps Greece, if this is a timeline where that country goes communist), and perhaps a Kurdish state is even established in the Soviet sphere of influence (let's say that the United States has an isolationist president at this point in time, or at least one too distracted with some other matter to strongly object, and that the other Western powers are in similar situations). But most importantly, Istanbul and the Bosporus are directly annexed to the Soviet Union, thus achieving one of Russia's main foreign policy goals for centuries.
How would this city be administered in the USSR? Would the Turkish majority stay, or, as with Kaliningrad after the Second World War, might they be expelled and replaced with Russians and others from the Soviet Union (perhaps including the Pontic Greeks)?
Let's say that, at some point in the middle to latter part of the 1940s, the Soviet territorial claims against Turkey lead to a war between the two powers. The conflict ends in a crushing Soviet victory: the Armenian SSR and Georgian SSR expand at Turkey's expense, Thrace is ceded to Bulgaria (or perhaps Greece, if this is a timeline where that country goes communist), and perhaps a Kurdish state is even established in the Soviet sphere of influence (let's say that the United States has an isolationist president at this point in time, or at least one too distracted with some other matter to strongly object, and that the other Western powers are in similar situations). But most importantly, Istanbul and the Bosporus are directly annexed to the Soviet Union, thus achieving one of Russia's main foreign policy goals for centuries.
How would this city be administered in the USSR? Would the Turkish majority stay, or, as with Kaliningrad after the Second World War, might they be expelled and replaced with Russians and others from the Soviet Union (perhaps including the Pontic Greeks)?