Volgogradball is an European city of Russiaball.
In Russian Empireball times (and even a bit earlier) Volgogradball was a pretty small Russian town called Tsaritsyn. Tsar was, as you know, Russian monarch's title. By about 300 years nobody cared, but then Russian Civil War happened and so he became Stalingrad. He finally became Volgograd, by the name of river Volga.