Just got to the Operation Mars bit in 'When Titans Clahed' by Glantz. Some facts about this forgotten Operation are really staggering. It was actually bigger than Op Uranus, the encirclement of 6th Army but is totally forgotten. The chapter notes give this info. The three Soviet fronts (Southwestern,Don & Stalingrad) participating in Operation Uranus at Stalingrad contained 1,101,00 men ; 15,501 guns and mortars ; 1,463 tanks; and 928 combat aircraft. At the same time , the Kalinin and Western Fronts and Moscow Defense Zone numbered 1,890,000 men; 24,682 guns and mortars ; 3,375 tanks and 1,170 aircraft. There are other comparisons between Mars & Uranus but the smaller one was a success & remembered , the larger one failed & is forgotten.