The large-scale sale of land to the Jews leaves tens of thousands of fellahin without land who then move to the slums on the outskirts of the developing cities. There religious and nationalist extremism is born which lead to the outbreak of the Arab rebellion - three years of war against the British and the Jewish settlement. The British put down the rebellion brutally and the Palestinian leadership flees the country while the Jewish settlement strengthens its ties with the ruling power. The British Peel Commission brings up the idea of dividing Palestine into two states for the first time.