Pan-Mongolism

thumb|right|280px|Regions commonly associated with Mongol irredentism thumb|Concentrations of Mongolic peoples (red) compared to the extent of the [[Mongol Empire (outlined in orange)]] Pan-Mongolism is an irredentist idea that advocates cultural and political solidarity of Mongols. The proposed territory, called "Greater Mongolia" (, Dayaar Mongol) or "Whole Mongolia" () usually includes the independent state of Mongolia, the Chinese region of Inner Mongolia, and the Russian region of Buryatia. Sometimes the autonomous republic Tuva, the Altai Republic and parts of Xinjiang, Zabaykalsky Krai, and Irkutsk Oblast are included as well. , all areas in Greater Mongolia (or Mongol heartland) except Mongolia have non-Mongol majorities.

The nationalist movement emerged in the 20th century in response to the collapse of the Qing dynasty and the possibility of an independent Mongolian state. After the Red Army helped to establish the Mongolian People's Republic, Mongolian foreign policy prioritised seeking recognition of independence over territorial expansion. After the 1990 Mongolian Revolution ended Communist rule in Mongolia, a number of organizations have emerged that promote pan-Mongolism, but they have little popular support.