Stalin had built the tras Siberian rail road telling the people it was a necessary expense for prosperity in the country being able to moe goods and people. Stalin knew if he wa going to compete with the west his new factories were going to need raw material. Most of the raw material was in the east and Stalins industrial cities were in the west. Plus Stalin understood the need of a rail road to mo e large armies quickly. But we did send a huge supply of rails and stock cars. I wonder if the cars were kits allowing the Russians to set the gusge of the wheels and we sent so much rails it made me wonder if they resmelted it for armor for their tanks and other production. They were using steel at such a high rate not just for tanks but weapons and trucks and munitions planes. We sent lots of trucks because they had such a huge army they couldnt produce enough for their huge army like what at the peak four million or was it more. Lol studebsker will live long in Russia don't know if they were copying but they had bunches of studebakers. Troop carriers, tankers, my favorite katyusha. Anyway they did use much of the rails to expand their rail system needed to build spurs to all those new relocated factories and stock cars to move all the troops and eauiptment in the east to the west. This was hitlers biggest blunder he was so sure the Japanese would tie up those troops but that never happened the Japanese were too engaged with their pacific expansion plus Russian tank technology gave them a wooping before and the Japanese were still far behind I don't think they felt they were ready to take on the Russians. Let's face it Japanese tanks were on the low rung and they had very few tanks at all the army didn't go into building large numbers of tanks mostly because Japan had a huge shortage of steel most went to the navy for ships and planes weapons tanks were at the bottom a bad decision a decent tank in large numbers could have changed a lot of the out come of the war. Made the taking of the islands a lot harder and maybe given them the Idea they could take the Russians. The war in 39 was over a part of land rich in oil and Japan was in need of oil. Might have made them want to get those oil fields again.