Military Hangar 15 was located in Rwookrrorro on Kashyyyk and was used as a base for Luke Skywalker's StealthX wing during the Second Galactic Civil War. The Jedi starfighter wing had support of local ground crews.
With this as their base, the StealthX wing took part in the Battle of Kashyyyk, launching an all-out strike against the attacking Galactic Alliance Fifth Fleet, while Master Skywalker flew in a shadow bomb attack on the Anakin Solo.