Why don't you show me where the assistance wasn't used during the battle.
The Soviets downplayed every bit of assistance they got during WWII because it wasn't good for the home front. They wanted the propaganda victory and the Battle for Stalingrad was the biggest propaganda victory of the war. So you're not going to find much on the subject since they wanted it to be a pure Soviet victory instead of an Allied effort. And admitting they used Lend-Lease equipment would have undermined the "Soviet" efforts. And your comments parrot that very same ilk and are just as false at they were when uttered in 1942. Why is it the Soviets went to great lengths to hide the fact a number of their highest scoring fighter pilots flew American produced aircraft?
But you can't tell me none of the US equipment made its way to Stalingrad during the battle. Or during Operation Uranus that relieved the pressure on Stalingrad. Russian soldiers didn't dine on the food sent or get supported by any of the 10,000 aircraft sent to them or use the jeeps like this:
American aid
Or the use of P-40s:
The P-40 in Soviet Aviation
Or food:
U.S. Lend Lease Policy
Tell me again how nothing the US or the UK did to help the Soviets during Stalingrad?