Board Thread:Lore Discussion/@comment-26213507-20150715194939/@comment-26893431-20150831143000

Draevan13 wrote: For the "Civil War questline" no, but the Skyrim Civil War event, yes, it is.

You can't complete the Main Quest without getting involved in the Civil War. Not the questline, but the event. It's not a Civil War event either, it's a Dragon war event, it's not because of the Civil War they signed a treaty.