MOBILE SUIT GUNDAM THUNDERBOLT

The story is set in the same One Year War in UC 0079 as the first Mobile Suit Gundam anime series. It follows the battles between two ace pilots of the Principality of Zeon and the Earth Federation at the "Thunderbolt Sector," a shoal zone with numerous wrecks of space colonies and warships. (Source: Anime News Network) — Description from AniList community (anilist.co).