Fallout: New Vegas/Cold, Cold Heart

This quest is obtained from Nipton after speaking with Vulpes Inculta. After introduction, he will mention that the town was ransacked to deal with the disloyalty. Depending on speech dialogue chosen, you can gain some minor fame from Caesar's Legion.

You can approach practically any NCR character, but the compass specifically points to Sgt. Kilborn at Mojave Outpost. You can choose to either inform him of the destruction, or to attack him. Either option completes the quest.