Don't Tread on the Bear! is a side quest in Fallout: New Vegas.
 Quick walthrough
- Work against the interests of the New California Republic or just be an overall nuisance to the NCR.
 Detailed walkthrough
The exact contents of this quest vary based upon player actions. It can result in one of four outcomes:
- The NCR has a robust network of informants. If you continue to work with Mr. House, the NCR will no longer accept your help.
- The NCR has a robust network of informants. If you continue to work with Yes Man, the NCR will no longer accept your help.
- Little escapes the eyes of NCR Rangers. If you continue to work with Caesar's Legion, the NCR will brand you a terrorist.
- The NCR has declared you a terrorist. Wherever the NCR has jurisdiction, you will be shot on sight.
The first three actions are, obviously, the result of aiding an opposing faction. The fourth is a result of gaining general NCR infamy, usually through killing their troops. In the case of opposing faction quests, it will first activate as a warning upon the completion of a certain quest in the series. Completing another quest will fail the quest. You will no longer be able to take on NCR quests once this happens, and any NCR quests active will immediately fail, as well. In the latter two cases, the entire faction will be hostile to you and NCR rangers will be sent to kill you.
 Journal entries
|1|| ||The NCR has a robust network of informants. If you continue to work with Yes Man, the NCR will no longer accept your help.|
|2|| ||Little escapes the eyes of NCR Rangers. If you continue to work with Caesar's Legion, the NCR will brand you a terrorist.|
|3|| ||The NCR has a robust network of informants. If you continue to work with Mr. House, the NCR will no longer accept your help.|
|4||The NCR knows that you are working against its interests and will no longer accept your help.|
|5||The NCR has declared you a terrorist. Wherever the NCR has jurisdiction, you will be shot on sight.|
- If Ambassador Crocker or Colonel Moore dies, the NCR will declare you a terrorist. Failing this quest will cause Ambassador Crocker and Colonel Moore to disappear from the game world, to reinforce the idea the player is no longer able to continue down the NCR quest line.
- This quest will not fail and you may complete NCR quests if you initially trigger it with House or Yes Man's quest line and then proceed with the other one's quest line. There are two separate quests here actually (one for House and one for Yes Man), and one will not trigger if the other one is active.
- Your reputation with the NCR will not be lowered if you complete this quest via House or Yes Man. In fact, so long as you have done nothing else to antagonize them, it is possible to breach the El Dorado Substation and get them to agree to a truce with the Brotherhood of Steel (in Yes Man's path) without dropping your reputation below Idolized. They will even still accept your help in preventing Aaron Kimball's assassination.
 Behind the scenes
"Don't Tread on the Bear!" is a reference to the "Gadsden Flag", a historical flag that depicted a coiled rattlesnake over the phrase "Don't Tread on Me."
|Act 1||Ain't That a Kick in the Head · Back in the Saddle · By a Campfire on the Trail · They Went That-a-Way · Ring-a-Ding-Ding!|
|Act 2||Wild Card (Wild Card: Ace in the Hole, Change in Management, You and What Army?, Side Bets, Finishing Touches) · The House Always Wins (I, II, III, IV, V, VI, VII, VIII) · Render Unto Caesar · Et Tumor, Brute? · Things That Go Boom · Kings' Gambit · For the Republic, Part 2 · You'll Know It When It Happens/Arizona Killer|
|Act 3||No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!|
|Other||Come Fly With Me · Crazy, Crazy, Crazy · Ghost Town Gunfight · Guess Who I Saw Today · Left My Heart · My Kind of Town · The Legend of the Star and A Valuable Lesson · Unfriendly Persuasion · Wheel of Fortune|
|Companion quests||ED-E My Love · For Auld Lang Syne · Heartache by the Number · I Could Make You Care · I Forgot to Remember to Forget · Nothin' But a Hound Dog · One For My Baby|
|Unmarked quests||A Bit of Slap and Tickle · Access Powers · All Fired Up! · Andy and Charlie · Arachnophobia · Arizona Scavenger · Barton the Fink · Bear Necessities · Big Winner (Atomic Wrangler, The Gomorrah, The Tops, Ultra-Luxe, Vikki & Vance) · Bounty Killer (I, II) · Brotherhood Bond (I, II) · Caching in at the Cove · Cajoling a Cudgel · Claws Mended · Claws Out · Dealing with Contreras · Defacing the Humble Stone · Democracy Inaction · Don't Poke at the Bear · Eddie's Emissary · Exhumin' Nature · Fight Night · Flogging a Dead Corpse · Friend of the Followers · Getting a Leg Up from Andy · Gland for Some Home Cooking · Harder, Better, Faster, Stronger · Hat's Entertainment · Help for Halford · Hidden Valley computer virus · Highway to the Danger Zone (I, II) · Honorary Rocketeer · I Love Bananas · Iron and Stealing · Keith's Caravan Charade · Laurifer Gladiator · Lenk's Bad Debts · Lily and Leo · Long-Term Care · Malleable Mini Boomer Minds · Maud's Muggers · Meeting an Equal · Missing a Few Missiles · Not Worth a Hill of Corn and Beans · Old School Ghoul · A Pair of Dead Desperados (I, II) · Papers, Please · Pistol Packing · Playing on the Old Joana · Poor Meat Never Makes Good Soup · Powder to the People · Power to the People · Proper Burial · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · Strategic Nuclear Moose · Straus Calls · Strip Search · Saving (or Savaging) Sergeant Teddy · Stocking Up · Suits You, Sarah · A Team of Moronic Mercenaries · Team Spirit · Thought for the Day · Tourist Traipse · Trudy's Radio Repair · A Trusted Aide · Useless Baubles or Fancy Trinkets? · We Must Stop Beating Like This · We Must Stop Meeting Like This (I, II, III, IV) · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman|