Nice summery! Even if I´m a bit disappointed about the "post-war anti-communist warnings" and "nazi excuses". That is always such a thought-terminating cliché with what one can stall every discussion in no time.
After reading my post again I indeed should apologise You for what I've written, it sounded too aggressive and didn't mean what I had wanted to say. I just associated Your words with a few articles, ideas and speeches. I'm sorry, I didn't mean to accuse You of justifying nazis or being gullible.
But to Your statements! I think, I don´t overestimate the Soviets. I think they were often underestimated in history and so many opponents, including the Germans, had to learn it the hard way. And didn´t I say that they lacked a proper military leadership because of the purge in the ranks of their officers and politicians? And sure my thoughts are speculative - that was the idea of Bootie´s question as I had understand it.
I cannot argue with underestimating Russians by many; let's say our history of wars with them wasn't the streak of success too. I don't even argue with Your earlier statement, that they might have the most powerful land forces in 1939. But still it's very unlikely that they would conquer the whole Europe by themselves. Their leadership could be better because they would recover from 1937 purge, but in 1941 another purge was about to begin, and it would have been probably as bloody as the previous one if Barbarossa didn't happened.
And about speculations - I ment only that we shouldn't discuss at lenght "what would have happened if the Soviets had attacked before Barbarossa", because it's a topic for another "Question of the Day". Nothing bad in speculations of course, what else we all do in here, right
.
About His Majesty's Planes and Ships, if I understood it correctly, You states that UK wouldn't be ready for Great Red Invasion. This is correct under circumstances:
1. Soviets would start their offensive in IX 1939;
2. They would advance with average speed of at least 8 km per day (to rush through a Europe to French border in about half a year).
If Stalin would launch his attack in 1939, it would mean he would attack also The Reich and Germans would then probably make peace with the West and Stalin would have to face Wermacht too. No, I think Stalin would only grab Baltic states, maybe Finland or part of Romania, and wait for Europe to blood. It wouldn't be great for him too though - just after the war (probably ended up with The Reich beaten) all economies of Europe would be geared for war production, all forces would be mobilised and politics would expect Russian invasion.
Also such speed of advance is unlikely. Such speed was archived by Soviets for example during operation "Bargation", but it couldn't last for long. Even though they had great advantage in everything, troops, tanks, planes, had a good plan and quite an experience already, they just attacked too fast for their logistics to keep up with their troops. And it would be much harder for them to rush through a Europe in 1939, since they didn't have all those fancy American land-leased trucks and already operating logistic system. 1500 km from western Soviet border to eastern French border is a lot of space, especially if it's well defended.
Lack of coordination could be Soviets greatest hope, especially if Germans would change sides and recently enemies would become allies. Still, even if it would provide Soviets few easy victories, the more punches a Europe would get, the more united it would be.
USA - indeed, they probably wouldn't go for a war by themselves (at least not right away), but would support English and French with supplies for sure. And they wouldn't support CCCP. All American factories could win the war, even if none Yankee soldier would stand on European land.
About Piłsudski and Sanacja (Piłsudski's party, still ruling in 1939) - true, he wasn't the most peace-loving figure of history, but the Second World War wasn't his idea. Even if another party would be ruling Poland Germany would attack it. Maybe some weaker personalities would accept German request to hand over Gdańsk and Pomerania, but it wouldn't prevent war. We would end up like Czechoslovaki
a and Hitler would look for another country to take it over without a fight.
And about KOP... well, KOP fought Soviets in September/October 1939. It was able to beat a few Soviet units, stall an offensive of some armoured corps for one or two days, but nothing more.
Greetings good people.