Don't Tread on the Bear!

 is a quest in Fallout: New Vegas.

Quick walkthrough
The NCR has a robust network of informants. If you continue to work with Yes Man/Mr. House, the NCR will no longer accept your help, or If you continue to help Caesar's Legion the NCR will brand you as a terrorist. You can start this quest by helping the NCR at the NCR Ambassador building at the end of the strip by Vault 21.