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WI the Soviets fired on allied aircraft during the Berlin Airlift? How would this WW3 play out? Who would win?

To give my own opinions, because of the Allied demobilization, I expect the Russians to overrun Germany and invade Denmark without too many problems. The invasions of Norway, Greece and Italy would be more difficult, considering the terrain, and I would think that by the time the Russians had reached the Rhine, the Allies would have reinforced themselves to a degree that an invasion of France would become unlikely to succeed. I would think that finally Spain and Portugal would enter the war as well, on the Allied side of course.

But of course you can't have a World War just in Europe; the Soviets would also invade Southern Korea and the Middle East, by invading Turkey, Persia and Iraq. I would think they would be stalled in the Turkish mountains and by the banks of the Tigris, but they would overrun Persia. We might possibly even see the Chinese Civil War becoming involved in the war.

To round it all up, the Americans would win in the end. They may be driven from Germany, or even Europe, but their greater industrial might would eventually out produce their Soviet counterparts. Stalin would not be able to use his 'Great Patriotic War' excuse and he would lose support when American tanks drive into Minsk, Kiev, Smolensk and beyond. The Nationalists would win the CCW with plenty of American backing, a united Korea would exist and I can see Moscow and Leningrad as nuclear wastelands. The Post-War world is slightly harder to gauge.
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