Arsenal City was a Jamuraan city-state which was part of the Kipamu League during the Keldon invasion. Located on the northerh coast of the northern continent of Jamuraa. For decades it had been the location where the war machines used by the League had been constructed.
When Barrin came to inspect the troops sent by Arsenal City and Kinymu to repel the Keldons, Mageta was the commanding officer. Mageta was very proud of the mechanical ants and crabs constucted in Arsenal City, although Barrin believed he was unwise to rely so heavily on mechanical troops. Mageta narrowly survived the subsequent defeat of his army at the hands of the Keldons and fought his way back to Arsenal City, where he remained nominally in charge of the ground forces, although the real organisation of the campaign was now in the hands of Barrin, Rayne and Teferi.
During the Keldons' siege of Arsenal City, Mageta led the foot-soldiers in a counterattack. His reputation and courage inspired the inexperienced troops to push back the invaders and win the crucial battle.