The Stalingrad Battle was one of the most fierce and bloodiest battles not only of World War II but in the whole history of warfare. Approximately there were 2 million casualties. The battle lasted for more than 5 months, from August 1942 to February 1943. It was for the possession of Russian city Stalingrad (now Volgograd) on river Volga. German troops with their allies attacked the city that was heroically defended by Soviet Army. The hard victory of the Soviet Army was the crucial moment of World War II.
There is a famous museum and memorial complex in Volgograd devoted to the battle for Stalingrad. The museum website has rich information and provides it in 7 languages: Russian, English, German, French, Spanish, Italian and Chinese. The website lets you have virtual tours to Mamayev Kurgan, Museum – panorama “Battle of Stalingrad”, Memorial Historical Museum and the Monument to Lenin:
https://stalingrad-battle.ru/projects/v-tours/
There are also 10 virtual exhibitions at this link:
https://stalingrad-battle.ru/projects/v-exhibitions/
and nearly 1500 photographs and documents accessible from the website: