Battle of Spiridon

A battle on Spiridon occurred when Davros and his "Rebel" Dalek army were confronted by the Imperial Dalek Army led by the Black Dalek Leader, acting on behalf of the Dalek Prime. (COMIC: Emperor of the Daleks!)

Aftermath and legacy
Human historians in the post-Time War universe acknowledged historian Caul Pornell's belief that the Daleks' Spiridon army had been harvested by Davros to form the first ranks of his Imperial Daleks. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)