Kidou Senshi Gundam 0080: Pocket no Naka no Sensou

A space colony known as Side 6 remains neutral during the conflict between Zeon and the Earth Federation. A ten-year-old boy named Alfred Izuruha passes the time by tracking the war and gathering military items. When Zeon forces arrive, suspecting the colony is hiding a Federation project, Alfred sees the event as an exciting development. As the situation escalates and both sides act more urgently, he may find himself facing the harsh truths of war.