Air power will indeed prove critical in blunting the 3:1 advantage of Soviet ground forces over Allied power
The Soviets simply did not have 3:1 superiority in ground forces in 1946. They had that advantage in number of divisions but Soviet divisions were massively depleted while western divisions were at full strength.
Also, here's a fun fact: while the Allied powers had a 3:1 superiority in heavy bombers, it's actually the Soviets who have numerical air superiority in fighters and fighter-bombers, apparently by around 11k planes. Certainly, the Allied fighters may be superior in quality (though this itself is a questionable assertion, as the Yak-3 was arguably close to, if not the equal of the P-51), but in the near term, it's actually the Soviets who would be able to seize air superiority
Nope, look at the Germans. They sent 80% of their fighters west and the allies achieved complete air superiority while they sent 20% of them east and the Germans dive bombers were able to operate much more aggressively and take fewer losses.
The Soviets had some decent late war designs but the allies had better planes and most crucially, better pilots.
The real issue with air superiority isn't close air support (which sure is handy though) but the fact that Soviet logistics are gonna get bombed to hell. The Germans had a million men on air defense and another million on rebuilding duties. Where are the Soviets going to find that manpower to spare in their six million man army?
Sorry, I didn't mean that air superiority by the Soviets was predicated on CAS alone; that whole paragraph was meant for the person saying that heavy tanks were more important than air superiority, which can be disproved by how quickly German offensives unraveled in the late war under Allied bombing campaigns. I meant that those fighters are going to be tasked with hitting the Allied heavy bombers before they can reach Soviet logistics. They won't necessarily succeed perfectly on that, and they'll likely burn through their fuel at a significant rate (the Lend-Lease program is presently supplying over 80% of the Soviet's aviation fuel needs; its cessation will require raw petrol and refineries to be retasked to making up the gap), but it will be very important to the near-term successes or failures of Operation Unthinkable.
Why are we assuming Operation Unthinkable? It's strategically idiotic. The west could, in a year achieve numerical superiority in Europe and destroy Soviet logistical capacity through a leisurely bombing campaign. Why would they attack before increasing their strength?
25% of France supporting a democratic left coaltion that included communists does not equate to 25% of France supporting Communist revolution.
The French were actively building an army in 46 to stand against the Soviet treat to Europe. It isn't a question of if the French would be allies with the Brits and Americans, it's how much they could assemble.
So, the scenario is going to start with the cold war going normally, except, the Allies build up forces across the border... then attacking when they are good and ready? After the propaganda demonizing Communism sets in.
Alright, so not a backstab. No surprise element either.
So, just out of curiosity as well, how are they going to explain this to their soldiers and, more importantly, their constituents? The Allies have already been drawing down their forces in 1945, serving discharge papers and the like. Churchill is out of office, and to the home front, the war is over. Politically, the only real window for an invasion is during or immediately after the fall of Germany. If you suddenly start mobilizing your forces again, Truman's going to have to go before Congress, and Churchill's going to have to explain to Parliament why he, a caretaker leader of the opposition, has started another war - really, Churchill will have to do that anyways. Any theoretical war will have to bear that in mind.
EDIT:
The scenario as I understand it is that the cold war goes hot over Berlin in 1946. I'm saying that the west would be delighted if the soviets let them just sit around in Germany building up their forces and bombing the east german infrastructure for six months.
Ah, and my assumption was completely different. Just out of curiosity, how does it go hot in 1946? Stalin doesn't make his move on Berlin until 1948.