The document discusses different armies mentioned in the Bible. It analyzes the army referenced in Joel 2:11 and distinguishes it from the locust army in Revelation 9. The army in Joel 2:11 is described as being made up of people and men, rather than locusts, and riding horses with riders rather than having the faces of men. The document then examines other references to armies in the Bible that are described as riding asses versus horses to further understand the nature of the army mentioned in Joel 2:11.