40 years after the events of Gundam 00, the countries of Earth are always under constant threat, no one trusts eatch other anymore, what will happen next?
The Gulnahan Ravine is a strategic pass east of Suez, which is the only point in the area passable by large vehicles such as land battleships. The Earth Alliance created a fortification known as the Lohengrin Gate in the middle of the Gulnahan Ravine.