Board Thread:Skyrim/@comment-11344160-20160205154012/@comment-1600847-20160914214728

Blademaster Jauffre wrote: 1) Tiber had already started the war with Skyrim, Danstrar was merely trying to kill an Imperial Commander who tried to conqeur Skyrim.

2) The Arcturian Heresy states that Tiber Septim was in Cyrodiil, meaning she came from there. 1) It never states that, only that he was fighting Danstrar.

2) It doesn't say "Tiber never ever left Cyrodiil during the entire war", only that he put Zurin in charge.