In such a vast battle among so many people, the wide area below the city wall is the best battleground.
This kind of epic battle is almost impossible in reality; even in modern interstellar wars, it's about elite troops competing with warships, armor, and mechas. Such large-scale frenzied slaughter has never occurred in reality.
Of course, it's not absolute; there have been peak wars where hundreds of thousands or even millions are engaged in a great battle, but having tens of millions on a single battlefield is almost unfeasible.
In reality, there are absolutely no cities so enormous to the extreme, stretching endlessly out of sight.
Even in favorable terrain, without special eyes, one cannot oversee the entire battlefield.
Most of the participating players learn the specifics of the battles through live streaming, as the distance is too great, or the terrain isn't right, making it impossible to see what's happening specifically.
