How to unlock: You must complete The First Step main quest and meet with Preston Garvey (in the place where he can be currently found). This quest is one of the randomly unlocked ones.
- Talk to the locals
- Secure the workshop in the marked location
- Inform the locals that you have succeeded
- Talk to Preston Garvey
This quest is one of many random ones related to Minutemen. The first time you can unlock it is after completing The First Steps side quest, when you talk to Preston Garvey and tell him that you intend to keep cooperating with his faction. Preston might ask you to help settlers from some other, randomly selected location. Then you must go there, talk to one of the locals and go to the place he points you at. Your objective is to secure the workshop. In order to complete it, simply clean the territory of any bandits and/or monsters. Once you're done, interact with the workshop (you don't have to construct anything), then return to the settler and tell him the good news. He will reward you with bottlecaps and new people will join the ranks of Minutemen. Once you're done, you must return to Preston Garvey and inform him about your success. He should give you some new missions.
Quest rewards: Experience points, bottlecaps, new side quest.