Shin Kidou Senki Gundam W: G-UNIT

In the year AC 195, a brutal conflict rages between Earth and its colonies. The remote asteroid colony MO-V remains unaffected at first, maintaining its usual way of life. OZ agents soon arrive, recruiting the colony to support their cause for independence. MO-V becomes a participant in the war, supplying resources to OZ, and faces attacks from an unknown faction known as the Stardust Knights. Odel Bernett, the colony's leading pilot, is defeated in battle. His younger brother, Odin, takes his place, piloting the newly developed G-Unit mobile suit to protect their home.