By the time Ruling Sword's Chariots reached the wall, Blood Red War Flag and Azure Guard had indeed been working on it for a while.
This situation was no secret, because the game was shamelessly using these sieges to make money. Anyone was allowed to watch this siege unfold, as long as they paid a little bit of money.
Everyone could clearly see the difference in this Black Sea Coast Stronghold siege.
Blood Red War Flag was first; they had reached the wall ahead of everyone else. Azure Guard was second, but Ruling Sword wasn't even third. A guild called Inferno had dropped a large sum of gold coins to buy 60 chariots to push from two different directions. Ruling Sword was the fourth team to reach the city walls.
The System only gave them one section of the city wall to attack from. If you wanted to line up in two rows to attack the Naga Archers, more than forty chariots could be placed.