Well, we are reaching to something here, isn´t it?
First of all Vasilevsky´s comentary didn´t took into it´s scope the Pacific Theater or the War at Sea were, is obvious, the USSR depended on the allied effort. The fact that the Soviet Union didn´t fought against Japan while the US and GB+colonies did fought there in various complex scenarios like China, Burma, New Guinea, etc. etc. etc. did outweights these affirmations.
But, on the other hand, these actions (or omisions) were part of multiple negotiations and accords that the Western Allies did accept. Stalin always pushed FDR and Churchill to open a front in France; why didn´t the western allies pushed Stalin in the East? There are reasons, yes, that maybe the diversion of resources would have affected the soviet offensives... but, wasn´t that something that would have favoured the overall western allied strategy to gain time against the Red Onslaught that was flooding Europe? And at the same time releasing pressure from the allies in the Asian continent? Anyway on 1945 the russians ran and claimed their own zone of occupation and incluence like North Korea.
About the money and supplies that the West gave to Stalin is an undeniable contribution. And a vital contribution. I do believe that the USSR would have been able to survive Barbarossa until the stand still in January 1942 but, after that, when the Germans attacked the Caucasus the soviets were in REAL NEED of the allied help, and more so in the mobile combats at the summer 1943. Many soviet units were equipped with American made units as the Red Air Force consisted in many American made aircraft. And about the money I´m quite sure the damm commie vermin didn´t pay their part back after the end of the War.
Put that aside I believe there is, also, some thruth in Vasilevsky´s words too.
Let´s face it. The greatest combats in scope, volume of fronts, number of contendants, EXTREME VIOLENCE, and that were bloodier were in the Eastern Front. Whatever the reasons the Eastern Front was the greatest one in the whole war, it was the one with the greatest number of sheer number of troops, tanks, artillery, aircraft and casualities that outweights all other fronts put together. And about the decisive turning points we have an incredible number of occasions: Moscow, Stalingrad, Kharkov, Kursk, Ukraine, Prussia, etc. etc.
We can say, on a first light analysis:
1. Great Britain did won on the Atlantic Ocean and the Mediterranean.
2. Great Britain did won North Africa while the US played a vital support in 1943.
3. The Italian Front was a Anglo American quagimare which was won by their combined efforts.
4. The Pacific Theatre was not only a US victory but a US Navy victory.
5. The Philipines was not only a US victory but MacArthur´s one.
6. Indochina was a British victory, no doubt.
7. European theatre was a Soviet-Western victory with a clear attrition and superior sacrificy from the russians. Just look at the casualties on each side with the number of years each side fought.
8. Japan was the victory of nuclear age in the shape of a Boeing B-29.
But the clear winner of the war was the Soviet Union. Before the Hitlerite invasion it was an underdeveloped, encircled farmer´s land. At the end of the war they expanded their influence to half of Europe, most of Asia, build satelite and client states as huge as Red China or as important as East Germany and North Korea, has complete armies on foreign soil with no intentions of leaving, were threating traditional zones of western influece as Indochina, Middle East and the heart of Europe. And they grew powerfull enough to make Truman sweat over Korea some years later while developing nuclear technology, jet propulsion fighters, sophisticated subs, etc. etc. etc. and became a contendant for over forty five years.
No other country left the war in so clear advantage, not even the US. The fact that between 1945 until 1990 the world lived a Cold War and the threat of global extermination was a daily dark companion to us is a proof of this undeniable fact: many fought Hitler and Tojo, many were defeated by them, only three empires did defeat the axis, but only the Soviet Union did really won and emerge victorious with all their expectations accomplished.
An appeaser is one who feeds a crocodile, hoping it will eat him last.
Sir Winston Churchill