Second Dalek War

The Second Dalek War was the second war between the Daleks and Humanity.

Origins
In the 26th century the Dalek Empire tried to manipulate the rival empires of Earth and Draconia into warring with each other; they were allied with the Master and supported him with Ogrons. They also quietly conquered the planet Spiridon and began experiments to turn their armies invisible; an army of 12,000 Daleks awaited this treatment. However, the Doctor exposed their plan and later ensured the Spiridon army was imprisoned in ice. (DW: Frontier in Space, Planet of the Daleks)

The War
The Second Dalek War was a vicious conflict that ravaged many worlds and lasted decades. (NA: Love and War, Return of the Living Dad, Deceit) The situation was grim enough that Earth would give its worst criminals the choice of execution or becoming highly-armed Dalek Killer soldiers. (DWM: Abslom Daak... Dalek Killer)

The Tenth Doctor travelled back to the war where he encountered Dalek X, the Dalek Inquisitor General. Using his TARDIS as a lure, the Doctor tricked Dalek X to the planet Hurala where he detonated a disused refuelling there, destroying Dalek X's command ship, the Exterminator, and ending the war. (NSA: Prisoner of the Daleks)