Kurmanji-speaking Kurds and Zazas have for centuries lived in the same areas in Anatolia. In the 1920s and 1930s, Zazas played a key role in the rise of Kurdish nationalism with their rebellions against the Ottoman Empire and later the Republic of Turkey. Zazas participated in the Koçgiri rebellion in 1920, and during the Sheikh Said rebellion in 1925, the Zaza Sheikh Said and his supporters rebelled against the newly established Republic because of its Turkish nationalist and secular ideology. Many Zazas subsequently joined the Kurmanji-speaking Kurdish nationalist Xoybûn, the Society for the Rise of Kurdistan, and other movements, where they often rose to prominence.