The battle of Yn was a conflict between the Sith Empire and a group of Jedi and rebels in which the Jedi attacked a Sith stronghold on the planet Yn. However, the Sith Lord Tulak Hord, his apprentice Ortan Cela, and their Dashade Shadow Killers Khem Val and Veshikk Urk led an army of dark side warriors to break the Jedi siege, eliminating the Jedi and the rebels who opposed the expansion of the Sith Empire. During the fighting, Urk and Val feasted on the Force potential of their enemies, and Tulak Hord used a ritual to draw the strength of his enemies to himself in order to gain power and vitality. After the battle, Hord led his armies to conquer the Jedi-held world of Chabosh.