The battle for Castilon took place on the planet of Castilon between 22 BBY and 19 BBY. Reaper Squadron, a starfighter squadron belonging to the Galactic Republic, was involved. During this conflict, at least three clone Z-95 Headhunters evaded laser fire while flying over Castilon's oceans. This engagement, where Reaper Squadron utilized Z-95s, played a role in establishing their reputation for employing that particular starship type.
The Castilon skirmish appeared in the Clone Z-95 Headhunter Expansion Pack for Star Wars: X-Wing Second Edition by Atomic Mass Games, which became available on May 27, 2022. The card "Reaper Squadron Scout," unveiled in a promotional tweet for the expansion on May 19, 2022, showcased this battle.