The Ullyr Uprising was a general rebellion on the House Trask planet Ullyr in the 39th century. The Uprising lasted for two full Ullyrian years and was eventually put down by General Luxas e Paravaxus Trask Tal'Tanith. The native Ullyrians were then subject to the Ullyr Cleansing in which a tenth of their population was exterminated.
Behind the Scenes
The Ullyr Uprising is a shoutout to the H. Beam Piper novel Uller Uprising which, in turn, was based on the Indian Rebellion of 1857 .