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Mamayev kurgan used to be a nameless hill marked on military-topographic maps as a height - 102,0. This hill was the main link in the general system of defence of Stalingrad front. This place became key position in the battle of Stalingrad. Soviet and German troops fought a fierce battle on its slops at the end of the 1942 year.
http://www.mamaev-hill.ru/en/default/