The nationalist movement among the Kurdish people first emerged in the late 19th century with an uprising in 1880 led by Sheik Ubeydullah. Many Kurds worked with other opponents of the Ottoman regime within the Committee of Union and Progress (CUP). A growth in ethnic consciousness at the start of the 20th century was spearheaded by the Society for the Elevation of Kurdistan. Some Kurdish nationalist groups agitated for secession, others for autonomy.