MOBILE SUIT GUNDAM THUNDERBOLT

In the Universal Century year 0079, the space colony known as Side 3 proclaims independence as the Principality of Zeon and declares war on the Earth Federation. One year later they are locked in a fierce battle for the Thunderbolt Sector, an area of space scarred by the wreckage of destroyed colonies. (Source: VIZ Media) — Description from AniList community (anilist.co).