The Beast Rider army was the name given to the collection of forces brought together by Beast-Lord Modon Kira for the decisive civil conflict against the dark side inhabitants of Iziz. Kira, by uniting all the Beast-Lords from every wilderness area of Onderon, created the most substantial Beast Rider force ever witnessed, and in 4000 BBY, with the aid of the Jedi Knights, began a siege of Iziz.