Fallen Hero

Fallen Hero is a miscellaneous quest given to you by Joe Savoldi, owner of the bar at Bunker Hill.

Quick walkthrough
You can start the quest by asking about a job to Joe Savoldi owner of the bar on the west side of Bunker Hill.
 * 1) Find any trace of Brent Savoldi
 * 2) Return hat to Joe Savoldi

Detailed walkthrough
Find Joe Savoldi in Bunker Hill most likely at his bar/motel on the West side. When you first speak to him he may go into dialogue with his son and bring you in to it. Keep talking to him untill the job dialogue option is available then select it and he'll tell you about his grandfather being in the minutemen.

You'll be told to find any trace of him, you can find his remains at Old Gullet Sinkhole north of Bunker Hill. Once you enter the sink hole pick up his grandfather's hat and proceed to head out through the tunnel you'll encounter a legendary ghoul on your way out.

Return to Bunker Hill and give the hat to Joe and he'll reward you with 150 bottle caps.