Uchuu Senkan Yamato 2199 S03E04 - Save Iscandar! Rebellion of the Young Heroes!

The Dezarium Fleet Attacks! In order to save the refugees who had evacuated to the sea of Iscandar, the Dessler fleet continued to fight in isolation. However, the Earth government, fearing that the war might escalate, forbids Yamato to intervene and orders it to return home. Unsatisfied with the attitude of the adults, Domon and the other youths plot a rebellion.