Board Thread:Lore Discussion/@comment-26213507-20150715194939/@comment-1600847-20150831134447

Blademaster Jauffre wrote: Considering the fact that Alduin is said to be the first born of AKATOSH it makes sense for the symbol of Akatosh to be the main screen.

Don't forget, the game isn't about the Stormcloaks or the Imperials, it's about slaying Alduin. I would say the Civil War is as important, since it's the very first thing you're introduced to in the game and you can't even complete the Main Quest unless you get involved in the Civil War.