The Allies were facing a lot more than 16 divisions in France, plus more in Italy. That simply can’t be accurate. The Germans had at least fifty divisions in France by D-Day.
And as fashionable as it has been in recent years to put down the impact of the bomibng campaign, Allied bombing had a huge strateigc impact on Germany’s ability to wage war. The devastating impact on the Luftwaffe and the diversion of resources alone - Germany used more than a quarter of its artillery gun and shell production solely to air defense of the Reich, IIRC - was enough to seriously impair Germany’s war effort, even if you were to assume the bombs themselves had no impact. And they had a considerable impact.
Furthermore, the extent of U.S. aid to the Soviets cannot be underestimated; it was HUGE. Soviet soldiers were heavily dependent on U.S. clothing and food. The Red Army moved its supplies on American trucks - more than two thirds of Red Army trucks were U.S. trucks (I’d like to see you run a modern army without trucks.) Aviation fuel? American. Raw materials by the millions of tons were delivered - I could not even begin to list the minerals, chemicals, and other raw supplies that were sent.
More than 22,000 armored vehicles of all types, including main battle tanks, were supplied via Lend-Lease, plus 350,000 trucks, and more than 70,000 jeeps.
Thousands of aircraft were supplied, including at least 1,700 P-39 and P-40 fighters.
EVERYTHING was sent. Calculators and adding machines, typesetting and duplication machines, 13,000 pounds of carbon paper, compasses, radios, engine parts, paint, pencils and pens, cameras and film supplies in incredible quantities, 22 million pounds of smokeless gunpowder and millions and millions of pounds of explosives and explosive components. 40 million pounds of dynamite. Factory equipment by the boatload - nine million machines or all types, rolling and milling machines, wire drawers, wood planers, lathes. Mining and smelting equipment, about $66 million worth in 1945 dollars. One hundred thousand grindstones. Seven million drill bits. More bolts, nails, tacks, and fasteners than you could ever count. Five hundred million pounds of linseed oil, eight million pounds of soybean oil, and 80 million pounds of “Expressed oils.” Binoculars and microscopes. Over nine thousand rail cars. Thousands and thousand of electric generators (super important in bivouac, I can tell you!) 24,000 transformers, 3.7 million flashlight batteries, 2.5 million pounds of soap, Name a part, a machine, or a peice of equipment, and it was sent.
You want naval supplies? Over 120 whole merchant SHIPS were given to the Soviets.
Here is some of the food that was sent: 8 million barrels of wheat, one BILLION “boxes” of sugar (whatever a “box” is) 350,000 pounds of uncooked pasta, half a billion pounds of dried eggs, 3.5 BILLION pounds of canned meat, 600 million pounds of fresh and frozen pork, ham, and bacon, 80 million pounds of cheese, 240 million pounds of fresh, frozen and condensed milk, 800 million pounds of oleo oils of varying types, 217 million pounds of butter, 50 million pounds of oatmeal, 126 million pounds of rice, 8 million pounds of coffee, half a billion pounds of beans, 57 million pounds of something called “wheat seminola,” 75 million pounds of peas, a million pounds of chocolate, 660,000 pounds of fresh onions, 30 million pounds of canned vegetables, half a billion pounds of edible and cooking oils, 40 million pounds of dehydrated vegetables, 7 million pounds of fruit preserves and jams, 40 million pounds of fruits in various states of being, 11 million pounds of sunflower seed oil, 2 million pounds of carrots, and more seeds than you could plant in a jillion years. They used other parts of those animals, too - over 35 million square feet of leather was sent, plus an additional 50 million pounds of leather for soles. And a million pounds of something listed as “reeds, hemps, panilla, poppies, etc.” Hmmmm.
Raw materials? The list of raw materials sent defies listing here; thousands and thousands of different materials went sent, many in enormous quantities. If you can name a raw material, it was sent.
Without U.S. help, the USSR would have been defeated; I’m not the slightest bit doubtful of that. They lost to Germany in 1917 and they damn near lost in 1941-1942, and take all that stuff away from them and they would have lost again.