SHIROI PILOT

In a small land in the Alps is a great fortress of a country intent on taking over the world. In this world were born the twin sons of a great scientist who had been working on inventions for his country but was killed. The two sons are sent to the slave pits, but one is rescued and raised as royalty. These two sons will find themselves against one another as one leads a slave rebellion, which leads to the other taking power… — Description from AniList community (anilist.co).