Ironically, however, a non-Arab led Sudan's first modern nationalist movement. In 1921, Ali Abd al Latif, a Muslim Dinka and former army officer, founded the United Tribes Society that called for an independent Sudan in which power would be shared by tribal and religious leaders. Three years later, Ali Abd al Latif's movement, reconstituted as the White Flag League, organized demonstrations in Khartoum that took advantage of the unrest that followed Stack's assassination. Ali Abd al Latif's arrest and subsequent exile in Egypt sparked a mutiny by a Sudanese army battalion, the suppression of which succeeded in temporarily crippling the nationalist movement.