Thenceforward Mehemet was undisputed ruler of Egypt. He had a genius for organization and government. Though cruel and vindictive, and even bloodthirsty, as regards his enemies and against evildoers of all kinds, he had a keen sense of justice, and a determination to mete it out equally, and without favour, to the people of all sects and races. He brought about peace and order and prosperity such as Egypt had never of late years enjoyed. He was ambitious to extend his rule. He organized for this purpose, and for asserting himself against the Porte, an army of a hundred thousand men raised by conscription and armed and drilled on the model of European armies, with the aid of French and Italian officers who had served under Napoleon. He also built a powerful fleet with the help of French naval constructors. He soon proved the value of his new army by putting down a revolt in Arabia of the Wahabees. He did this, on behalf of, and in the name of the Sultan. He also conquered the oasis of Senaar and extended the rule of Egypt into the Sudan. It will be seen that later, in 1825 and 1826, he sent his army and navy in support of the Sultan to the Morea for the purpose of putting an end to the revolution in Greece, which the Sultan had been unable to cope with. Before dealing with this, however, it will be well to revert to Mahmoud and explain the course of events which compelled him to call in aid Mehemet Ali’s army. One of the earliest matters which Mahmoud had to deal with was that of Serbia. The treaty of Bucharest had left that province in a very unsettled and ambiguous position. The Turks, under its terms, were permitted to garrison Belgrade and other fortresses, and were to concede to the Serbians self-government, but there was no adequate guarantee for this. The Serbians, who were in possession of the fortresses, refused to give them up to the Turks until a scheme of self-government was arranged. The Porte insisted on immediate surrender. Subsequent proceedings showed that there was no intention to give effective self-government to the Serbians. The Sultan in 1813 sent an army to enforce his claims. Kara George, in most strange contrast to his previous heroic action, lost courage on this occasion. After burying the treasure which he had amassed as virtual ruler of Serbia, he fled the country and sought refuge with the Austrians. In so doing he passed out of the history of his country, save that when, some years later, he thought he might safely return to Serbia, he was arrested and shot as a traitor.