Games like Warhammer 40,000: Gladius - Relics of War

If you finished Warhammer 40,000: Gladius - Relics of War, the closest matches are Endless Space 2, Age of Wonders: Planetfall, Might & Magic Heroes VII, Distant Worlds: Universe and Sid Meier's Starships. All 9 share its strategy genre and are ranked by how closely their themes and modes overlap.