Rzhev meatgrinder

Why haven’t you mentioned the Rzhev Meatgrinder? This battle was taking place as the same time as Stalingrad. Some have even said it was critical to the outcome of Stalingrad. I know the front didn’t move much, but that in itself is important. It was this battle which is where Halder sent all the German reinforcements instead of Stalingrad. Don’t you think its important?