Anyone wishing to read more in to the subject, i would recommend the following book.http://www.amazon.co.uk/World-War-II-Be ... ewpoints=1
There was also a TV series here in the UK, which highlighted the main points in the book.
It makes the point that Stalin was deeply concerned that Germany conquered France so easily.
It has been published that very shortly after the victory in France, Hitler was looking eastward already.
He probably though like the French that the war would become stagnant and become entrenched for years.
Which would have given him more time to prepare for the clash with Hitler.
I forget who said it after or maybe during the war "that war in the east was our destiny"
I would add that part of British diplomacy is and always has been to some level. That your enemies, enemy is your best friend.
The Russians like everyone else were deeply suspicious of British intentions and interests throughout the world.
I doubt he Brits really tipped of the Russians about Germany plan to invade. Was fairly obvious something was going to happen when Germany rearmed.
Did the Germans waste time in the Balkans before invading Russia in 1941. Which ultimately meant they could not knock out Russian in WW1.
More British stupidity than good luck in Greece. Might have helped stopped the Germans before winter set in achieving Barbarossas aims.
The book mentioned above, states that Russian mobilisation in WW1, raised the stakes. Which was one of the catalysts that lead to German troops been readied for war. No one wants to get blamed for starting the war, but neither wants to give the other a head start should the fighting start.
Where would Germany have got the immense investments from, before it could see the output from conquered Russia.
Print more money and devalue its own currency seems to be the modern trend.
Why do countries even bother to invade other countries then. If not to impose their own will on the humans and reap the benefits of that countries materials. Yes there is the debate about religion and ideologies but that is personal belief.
The world runs on trade across the water. Not Panzers.
You are quite right to say it would take a generation to repair and rebuild anywhere a country from conflict.
However, you do grown corn and harvest it from year to another. Hence the bible calls it the staff of life .
As a foot sore infantryman or peace time factory worker, the day to day needs need to be supplied from somewhere. Sometimes you have no option to literally live off the land. when there is no macdonalds nearby.
Up until modern transport armies could only march with what they could carry.
The Russians simply shut up shop and moved their factories eastwards to produce tanks away from the Germans.
So regeneration can happen much quicker, even to provide the full infra-structure if needs be in wartime.