Don't Poke at the Bear!

Don't Poke at the Bear! is a unmarked quest in Fallout: New Vegas.

Quick walkthrough
If the player has not allied with the NCR or done anything to increase reputation with the NCR faction, the player may be randomly visited by three NCR Rangers. The Rangers give the player three days to begin an alliance or improve reputation with the NCR. If the player does not improve reputation after three days, the unmarked quest Don't Tread on the Bear! will commence.