Mercenary enclave

The Mercenary Enclave was in a Crystal cave on Dantooine

The Enclave was created post-The Jedi Civil War

The Mercenaries under the sentient Azkul were in the cave at one point the Jedi Exile visited the cave and fought a Mercenary captain and five to six of her troops to free Jedi Master Vrook Lamar and found her crystal in the cave as well