Blutarch Mann (1822-1972) is the brother of Redmond Mann and Gray Mann and the one who hired the BLU team in Team Fortress 2, Blutarch uses an immortality machine to attempt to outlive his brother, but his brother did exactly the same.
In late comic, Blood Brothers, set in 1972, he and "twin" brother decided to end this war. However, their long lost aforementioned brother, Gray Mann, assassinated them, ending the war and leaving no winner but himself.
In Grave Matters (set a few seconds after the previous web comic) has the ghosts of Redmond and Blutarch arguing who died first thus who won the war. They eventually have their opposing teams, RED and BLU, push each other's cart (who is stuffed with their corpses) to Hell, as whoever gets to Hell first is the first to be technically dead and so, whoever gets to Hell first loses. Since this is a never ending game mode, it is never determined who actually wins the war, as it simply depends of the players.