Wars and battles that have occured throughout the in-game history of the Metroid series.
“The Horus Rebellion was an intense skirmish mentioned by G.F.S. Olympus crewmen in Metroid Prime...Horus Rebellion
“The Tetra Border Wars was an unknown event that apparently took place in the Alimbic Cluster...Tetra Border Wars
“The Fourth Battle of Torvus was an event that took place on Aether in the Torvus Bog. B-Stz lead...Fourth Battle of Torvus
“The "Species War" is a conflict mentioned by P-1 while being interrogated in the Metroid Manga...Species War