All of the Arab countries have basically seceded from Ottoman empire under an occupation of this or that European country. "Unilaterally" is not easy to define

All of the Arab countries have basically seceded from Ottoman empire under an occupation of this or that European country. "Unilaterally" is not easy to define. Sometimes there is a long and violent struggle for independence and the metropole eventually gives in and signs some paper, sometimes it is stubborn and doesn't sign anything - the difference is not that important in my opinion.