Ah...nice try, but no. I'm sorry, you've been misinformed.
Our help was useful, but hardly critical to the Soviet's survival against the NAZIs.
the Soviets did what Russia always does when attacked from Europe -- they got their asses kicked at first, they retreated behind the Urals and they let the invaders wear themselves out and overrun their suppl;y lines, too.
Mostly what impressed the Soviets, and what they truly wanted from the USA was our trucks:
Here's some statistics to help you reducate yourself about this subject:
LEND-LEASE EXPORTS OF MILITARY ITEMS TO U.S.S.R.
................
1941 1942 1943 Total
Planes ..... 150 2,500 5,150 7,800
Tanks ..... 180 3,000 920 4,100
Vehicles... 8,300 79,000 144,400 231,700
Source: Fourteenth Report to Congress on Lend-Lease Operations (March 11, 1944), 32.
You see...we could not actually get all that much material aid to the Soviets in the early years.
Those nasty Germans kept sinking our ships.
My father actually served in the merchant marines during WWII and visited Russia many times during that conflict. (both Mermansk and the Arc-angle runs)
On one "coffin corner" convoy (northern run above the artic circle) in 1941 we lost over half the ships before they got into Russian ports.
My father was on in that convoy, incidently.
By the time it was really safe for our covoys to sail to Russia, the Soviet factory system was cranking out enormous amounts of war materials and didn't much need our help.
There's a fabulous book I'll recommend about the Soviet's war, if you're interested in this sort of nuts and bolts exploration of that war.
Russia at War 1941-1945 by Alexander Werth.
One of the amazing things you'll learn is just how much material the Soviets were able to build during that war even while the NAZIs were at the front door lobbing shells into those factores.
Even while the NAZI's were kicking their asses on their western front, the Soviets (in the far east) were cranking out more tanks, more planes and more artillary than you or I would have imagined possible.
You see, Joe Stalin knew perfectly well that the Germans were going to invade his country, so he'd prepared his nation to accept those early loses by moving a whole lot of his arms factories far to the East.
Hey, don't feel bad.
I had no idea any of this was true, either, until I read this book about this particular subject.
It was BRITIAN which mostly needed our materials aid, not the Soviets.