The closest massive power to Black Iron City mainly consisted of members from the Earth nation of India.
The fall into the "Heavenly Pit Forest" this time was highly regular; the personnel were not randomly distributed to different "Heavenly Pit Forests." Consequently, Earth's major nations essentially all fell into contiguous Heavenly Pit Forests, avoiding any random, chaotic scenes.
Although plummeting into a strange world filled with various terrifying monsters caused widespread fear and confusion among ordinary people, certain organized institutions, such as the military and religious groups—which already had strict management and order—managed to adapt quickly after a brief period of chaos.