Since the residences of the Big Four surrounded the White House, it could easily be considered the first and last defense of the American government. The next day, the gods bid themselves farewell, reaching and returning to the territories of their respective families, each mentally prepared for this battle.
The commercial district was massive, covering over seventy percent of New York's land mass. The territories of the Big Four, alongside that of the White House, covered 30-40% of that land mass.
There was a reason why President White never allowed the Big Four to purchase territories outside New York to farm for resources like the others.
Both their soldiers and war weapons have been hidden within their territories, patiently waiting for this day to come. The betrayal was expected and that's why President White wasn't too surprised about it.