The Planet Qo'nos had discovered that the Planet Skaro had appeared in Outer Space where nothing besides empty space was there beforehand and the Klingons had run into the Daleks for the first time because of it.

The Time Lords left the 22nd Century to deal with the Borg Invasion in their own Time Period as the Daleks retreated away from the Planet Earth with the Klingons chasing them.

The D-7 Class Klingon Starships would advance the Klingon Empire 100 years ahead of their current development, however the fact that the Klingons are outclassed by the Daleks anyways would not last forever.

The Daleks had Phasers from the 24th Century and the Klingons from the 22nd Century needed the D-7 Class Starships to even the odds between them in the long-term.

The Klingons are losing to the Daleks when the D-7 Class Klingon Starships from the future came to save them.

The Xindi Probe attacked the Planet Skaro as the Klingons fought the Daleks throwing both sides into confusion over what happened.

For the Klingons the Xindi Probe was the most advanced automated weapon they had ever seen and the Daleks had what was left of it being researched to figure out who attacked the Dalek Empire.