The Goblin Army is a military organization that protects the Goblin City and its citizens as well as serves Jareth the Goblin King, and an antagonistic organization. It is the most prominent organization amongst the goblins where many of them find their employment.
The Goblins are a fictional hybrid race that act as the secondary antagonists of the 1986 dark-fantasy film "Labyrinth" and they are the minions of Jareth who is also their king, implied to be their creator as according to the mythos of the story. Goblins are created via trapped children in the magical world Jareth inhabits for a certain amount of time.
The aim of the film's protagonist, the human teenager Sarah Williams, is to save her baby half-brother Toby from such a fate and Jareth threatens to transform him into a Goblin while also unleashed various traps with the massive Labyrinth to foil the heroine on her jounery towards the Goblins' homeland known as Goblin City at the center of the Labyrinth. And when these traps begin to fail Jareth also has his Goblin minions along with his militant "police" try and slow down her progress.
Due to the Goblins being a hybrid race, they exhibit a wide array of appearances but tend to be small and ugly humanoids with a mischievious, anarchic sense of play - at the same time they are fearful of Jareth and will do as he says without question.
The Goblin Army served Jareth loyally and without question. They defend his kingdom and act as the land's police to all of it's Goblin inhabitants and enforce the will of their king as his word was law. Regrettably, the Goblin Army is famous for its general incompetence, and its inability to protect The Goblin City from any threats that present themselves. Dozens of soldiers were deployed to prevent Sarah Williams and her companions reaching Jareth's Castle, yet were unable to keep her from her objective.
In terms of tactics, the army tends to attempt to overwhelm the threat at hands by deploying large numbers of soldiers to face the enemy head on. There appears to be little coordination in the tactics used by the diffirent divisions of the army, with each demonstrating unique fighting styles.
The Goblin Army answers directly to Jareth, reporting to him on how they fare in battle. Generals from the army often seeks Jareth's guidance when in the heat of battles, requesting his assistance.