Armenians
From the mid-nineteenth century, Armenians faced large-scale land usurpation as a consequence of the sedentarization of Kurdish tribes and the arrival of Muslim refugees and immigrants (mainly Circassians) following the Russo-Circassian War. In 1876, when Sultan Abdul Hamid II came to power, the state began to confiscate Armenian-owned land in the eastern provinces and give it to Muslim immigrants as part of a systematic policy to reduce the Armenian population of these areas. This policy lasted until World War I. These conditions led to a substantial decline in the population of the Armenian highlands; 300,000 Armenians left the empire, and others moved to towns. Some Armenians joined revolutionary political parties, of which the most influential was the Armenian Revolutionary Federation (ARF), founded in 1890. These parties primarily sought reform within the empire and found only limited support from Ottoman Armenians.