The NCR-Raiders War is a continous fight between the New California Republic and the wasteland's various raider tribes. The NCR seeks to eradicate them as the original Khans nearly destroyed Shady Sands before it could become the NCR. When the NCR rose to power, they led great military strength against the remnants of the Great Khans, Vipers and Jackals, whom they pushed to the Mojave Wasteland.