Durring the Battle of Canary Wharf the Daleks and the Cybermen finally got a chance to face off in an epicly awesome session fanaily. The Cybermen disguising themselves as Ghosts.Invaded earth from another dimension with the unintentional aid of The Torchwood Institute and quickly started to take over but unknown to the Cybermen and the Doctor something else also came through the void a "sphere" with no weight and no mass Rose being left to basically figure out what was going on found the room that sphere was being kept witch due to the protection of earth and the break down of the dimensional barriers also was our old friend Mickey in at just around the time that it opened and inside? What else Daleks and not just any daleks the Daleks known as the Cult of Skaro who had names and were able to think originally to aid the destruction of the Daleks enemies (everyone) there names were Dalek Sec, Dalek Caan, Dalek Thay and Dalek Jast they had a stolen object (Time Lord Technology) called the Genesis Ark but they could not open it but rose could they found this out by "extracting" info from Dr Rajesh Singh thus killing him rose wouldn't
The Daleks declined the Cybermen's offer of ruling Earth together. But when the Cybermen fired the Cult of Skaro had force fields as then Thay exterminated the Cybermen. Dalek Sec and the Cyber Leader declared War against each other 5 million Cybermen Vs 4 Daleks. Then later on in the Sphere room Jake, some of his Troops and some Cybermen fought against the Daleks but failed to wound them. At this point the Cybermen began upgrading the Torchwood Staff like Yvonne Hartman. The Daleks then proceeded to Torchwood's Alien artifacts room and fought against the Cybermen and the remaining Torchwood Staff.
Than the Daleks were known as the Cult of Skaro and had names Dalek Sec, Caan, Thay and Jast. They had a Genesis Ark with them which held millions of Daleks and was Time Lord Technology. Dalek Thay went to investigate and met 2 Cybermen. Then the Cybermen spoke to they and then he spoke back. They wanted to identify each other.
Then the rest of the Cybermen headed back to the Torchwood Tower to help the Cybermen there. Dalek Sec filed up with the Genesis Ark and released the trapped Daleks. Then 5 Cybermen including a Cyber Leader were heading up to the main part of Torchwood until Cyber Yvonne Hartman remembered herself and killed the Cyber Leader and his Troops. The Daleks in the skies fought against the Cybermen on the ground. The Doctor and Rose held onto 2 Clamps and released the Voids doors. The Daleks and Cybermen flew inside it but one of the Controls blew. Rose let go of her Clamp and pushed it up, by this point the remaining Cybermen and Daleks flew into the Void. Dalek Sec and the Cult of Skaro Emergency Temporal Shifted. The Doctor saved Earth but lost Rose Tyler. There was a list of the Dead of the Battle at Canary Wharf with hundreds of people's names on it.
They appeared in Series 2: Army of Ghosts and Doomsday
Here is a video of the Battle of Torchwood between these 2 monsters: