Despite the non-aggression agreement, the Western federation never let its guard down.
To prepare for a potential invasion from the East and strengthen the unity of the West, the ultra-nationalistic military academy Nirvana was established.
There, warriors of any country, gender, or race can gather to battle and deepen their bonds.
While they study as students, they also serve as soldiers and are sometimes dispatched on missions, such as quelling civil unrest.
Their military power has become so strong that it cannot be matched by the armies of small nations.