The Battle for Fort Sungard

Information
This quest belongs to the Stormcloak questline.

Quick Walkthrough

 * 1) Report to Galmar Stone-Fist and receive your orders
 * 2) Take the fort in Sungard

Detailed Walkthrough
When you get the order to meet up with the men whom are going to attack Fort Sungard, go there and they will be located north of the fort. When you arrive they will begin attacking the fort, just follow them and kill as many soldiers as it is required. The journal will keep track of how many percentage of enemies there is left to kill.

After you are done just head back to Ulfric Stormcloak.