Demon Apocalypse

The gates of the underworld have opened, allowing a horde of demons to spill out into the human realm. The world militaries are ineffective against the otherworldly forces of the underworld as the demons invade and conquer the land one continent at a time. What's left of humanity have banded together in and formed the Anti-Oni Coalition. Made up of military leaders from America, United Kingdom, Japan, Russia, China, and Australia. The AOC are headquartered on an island near the Bermuda Triangle.