The Karen are a major ethnic group of Burma, though several hundred thousand live in northern Thailand. Linguistically Tibeto-Burman, the Karen maintain a legend that dates them back to the Gobi Desert of Mongolia. There are several branches of Karen the Red Karen (Karenni), Sgaw Karen and Pwo Karen. There is also the hilltribe of Padaung, better known as 'Long-neck Karen'. In present-day Myanmar, the Karen rebel army, the KNU, has continuously fought a bloody civil war with the central Burman government since 1948.