The Circassian genocide, or Tsitsekun, was the Russian Empire's systematic mass murder, ethnic cleansing, and expulsion of 95–97% of the Circassian population, resulting in 1 to 1.5 million deaths during the final stages of the Russo-Circassian War. The peoples planned for extermination were mainly the Muslim Circassians, but other Muslim peoples of the Caucasus were also affected. Killing methods used by Russian forces during the genocide included impaling and tearing the bellies of pregnant women as means of intimidation of the Circassian population. Russian generals such as Grigory Zass described the Circassians as "subhuman filth", and glorified the mass murder of Circassian civilians, justified their use in scientific experiments, and allowed their soldiers to rape women.

The Circassians or Circassian people, also called Cherkess or Adyghe are a Northwest Caucasian ethnic group and nation who originated in Circassia, a region and former country in the North Caucasus. As a consequence of the Circassian genocide, which was perpetrated by the Russian Empire during the Russo-Circassian War in the 19th century, most of the Circassian people were exiled from their ancestral homeland and consequently began living in what was then the Ottoman Empire—that is, modern-day Turkey and the rest of the Middle East. In the early 1990s, the Unrepresented Nations and Peoples Organization estimated that there are as many as 3.7 million Circassians in diaspora in over 50 countries.