How To Unlock: Capture Fort Sungard or Fort Greenwall."
You’ll have to do a handful of quests here to initiate the fort capture, but they’re essentially of similar ilk, but from different sides, we assume. These quests are (and these are the Imperial names of them):
- The Jagged Crown – Takes you to Korvanjund.
- Message to Whiterun – Deliver a message and more.
- Battle for Whiterun – Take sides.
- Reunification of Skyrim – Ongoing.
- Compelling Tribute – Gain valuables for the war effort.
- The Battle for Fort Greenwall – As it sounds.