During the Thrawn campaign, the group known as the Wayland insertion group was tasked with the mission of shutting down Grand Admiral Thrawn's cloning operation. This facility was located at Mount Tantiss on the planet of Wayland.
Mara Jade's imprisonment by Colonel Jak Bremen, due to her possible involvement in an Imperial raid targeting Coruscant, led to her revealing the location of Thrawn's cloning facility to Luke Skywalker. Skywalker then agreed to free her in return for the coordinates that would lead them to Wayland. Han Solo, Chewbacca, and Lando Calrissian became members of the insertion group, along with R2-D2 and C-3PO. Piloting the Millennium Falcon, a YT-1300 light freighter, the group touched down on the planet and made their way through Wayland's forests to Mount Tantiss.
Almost a decade after Mount Tantiss was destroyed, Pollo Tipn, a Devaronian, included the Wayland insertion group in a preliminary report about the Thrawn campaign for professor Voren Na'al.