Does any one have any history on a Russian Tank called "Sasha's Chariot"?

I found this name in Call of Duty: World at War when examining a Russian tank and found that it was called Sasha's Chariot. I found this interesting because most Russian tanks in the game mostly just say what factory it was from and a number. This is the only Russian tank (that I have found so far) that has a unique name besides the Tiger Tamer. Does anyone know anything about these uniquely named tanks or anywhere I could find and info?