Army+of+the+Dead

The Army of the Dead have many names, the Dead, Oathbreakers, the Shadow Host, the Dead Men of Dunharrow, and the Grey Host. Their master is the King of the Dead. They pledged never to be in the war, but they gave an oath to Isildur. When the war came the Dead just hid away in the mountains. They hid there untill Aragorn called upon them and they had to fufill their oath by fight against Sauron in the war.

Bibliography: >
 * 1) "Dead Men of Dunharrow- Wikipedia, the free encyclopedia" http://en.wikipedia.org/wiki/Dead_Men_of_Dunharrow
 * 2) **"** Dead Men of Dunharrow: Information from Answers.com" [|http://www.answers.com/topic/dead-men-of-dunharrow>]
 * 3) J.R.R. Tolkien's The Lord of the Ring