Why do people use the word "there" when they really mean "their"?
Why do they use the word "and" instead of "an"?
Why do they use "a" instead of "an" when an "an" is required?
Because they are ill-educated and unable to express themselves properly. Oh, and they are human beings who make mistakes - some because of poor or bad education, some merely because they are ignorant. They should be tolerated. They are merely products of a modern education system which has given up education as its raison de'entre' in lieu of child-minding and "social consciousness raising".
However, what really get's my goat is mispellings in an age of spell checkers.
Just think of an alot...
Anyway, back on topic. One must consider the mentalities and intentions of the parties involved would be. A conflict between the Western Allies and the Soviets would not be the same as what happened during WWII IOTL. As such the military strategies adopted would be different.
Stalin, or whoever would be running the show in the Kremlin most likely wouldn't be so insane as to fight to the very end, and an unconditional surrender would probably not be on the table. As such, the Western Allies would most likely not be trying to conquer the USSR as it wouldn't be necessary, they would just need to get the Soviets to call it quits, which probably could have been done by simply taking some of the western part of Russia proper.
As such a strategic bombing campaign wouldn't need to completely cripple the Soviet industrial base, just keep them from being able to maintain offensives into Europe. Now a late 40's WWIII situation is right out due to the presence of nukes, so let's assume a Red Alert type scenario where Germany doesn't go Nazi.
Let's say that the Soviets start to go on the offensive some time in the late 30's, maybe it starts as a Soviet-Polish conflict that quickly expands, or maybe something like the Winter War. You'd probably get a rather large European Coalition involving most of europe all the way from Poland to France. Let's assume that while the US isn't a direct combatant, it is supplying the Allies with weapons and equipment. So, you'll probably have a rather large inventory of long range multi-engine bombers.
The Soviets at the time were behind the western powers in terms or aircraft, so the air war is most likely going to go in the Allies favor. I suppose that this means that the Allies will have free reign over Russia by the second or third year of the war. At this point the Allies don't need to wipe out Soviet industrial capacity, they just need to prevent it from being used effectively to supply Red Army offensives into Europe. So I would imagine constant bombing of Baku in the Caucuses, as well as constant bombing of railroad lines(moscow will get considerable attention for obvious reasons).