The planet was dominated by gangsters, and much of the galaxy's phobium was mined there. Gargon was a source of raw materials for the construction of the two Death Stars.
Grand Admiral Miltin Takel was from Gargon. Grand Admiral Josef Grunger aided Takel's second in command to patrol Gargon due to reports of albino-skinned marauders around 3 ABY. He betrayed the fellow Grand Admiral and took over the planet following the Battle of Endor. Despite an unsuccessful attempt by Takel to oust him, Grunger continued to use the planet as his headquarters, until he was killed at the Battle of Tralus in 5 ABY.