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Azure Terra - the only remaining continent left for Humans to live here in Prime Earth. It is surrounded by the Great Terran Wall, protecting it from demons who want nothing more than to wipe out the remaining traces of Humans to completely annex this world.
The Great Terran Wall was 1000 feet tall. A certified giant even amongst the great buildings and infrastructures of humanity. It's said that this was made by a single person. How? That's a damn good question. Unfortunately, the truth isn't available to the public. Most of the people only knew that it existed to protect them, the rest doesn't matter.
There are only four, and only four, entrances built to access Azure Terra, and each of those entrances are located in the cardinal directions and each gate is heavily fortified and guarded by the military.