Shin Kidou Senki Gundam Wing  

Mobile Suit Gundam Wing, New Mobile War Chronicle Gundam Wing, 新機動戦記ガンダムＷ〈ウイング〉

After a long period of conflict, the Gundam warriors managed to establish tranquility between Earth and its colonies through their efforts in defeating Oz and White Fang forces. Now that the aftermath has settled down, the surviving soldiers have regrouped into new factions. Heero Yuy has transformed into an anti-war crusader, patrolling for weapons caches to destroy them, while Relena, who was once Earth's queen, continues her efforts politically to maintain peace. However, a hidden arms factory has been discovered near Mars, and the boys must dust off their mechs once more to defend the fragile peace.