Teleportation that would have been used to evacuate from the Imperial City during the Battle of Red Ring. Teleportation would have also made taking Hammerfell possible. Teleporting Large Armies has never been a reality in TES.
EDIT Kyne did teleport an entire Army off a Battlefireld, but She is an Aerdra, and She used Her Voice to do it.


and this is the Stormcloak version then we also have the Imperial wich is a even Larger forces but i would preffer that Dovahkiin stayed with Ulfric or with the Greybeards