Doubtless, during this residence in the desert Moses legislated both morally and socially for the Jews, as Muhammad did for the Arabs at Madinah. But as the Koran was not put together during Muhammad's lifetime, so it is also highly probable that the Pentateuch, or five books of Moses, were not collected and collated till some time after his death, which last is described in the work itself.[6] Indeed, many things mentioned in them show a more advanced state of civilization than the children of Israel enjoyed during their wanderings in the desert. [Footnote 6: This subject is treated at considerable length by Dr. A. Kuenen in 'The Religion of Israel,' translated by Alfred Heath May from the Dutch. Williams and Norgate: London, 1882.] But, still, to Moses the Jews owe their nationality, as the Arabs owed theirs to Muhammad. The former found a weak people, united to a certain extent, but quite unaccustomed to fighting and hardship, and he welded them sufficiently together to enable them, under his successors, to establish themselves in the promised land. The latter found Arabia inhabited by a quantity of tribes, more or less hostile to each other, but brave to a degree; fond of fighting and plundering, and always at it; full of local jealousies and internal enmities, which kept them separate. Muhammad not only induced them to believe in one God, but also brought them together to such, an extent that his successors were able to launch them as united warriors and conquerors throughout the East, and to found an empire for the time being far greater, grander, and more important than Canaan, as divided among the twelve tribes, or the dominions of David and Solomon. As a military leader Muhammad was not particularly celebrated. The military expeditions undertaken by him in person are variously stated to have been from nineteen to twenty-seven in number, whilst those in which he was not present are stated to have amounted to more than fifty. With the exception of one or two to the Syrian frontier, they were chiefly directed against the Arabs and the Jews in Arabia, but none of them were of the magnitude of those undertaken by his successors, Abu Bakr and Omar, who, with the aid of the generals Khalid, son of Walid, Mothanna, Amr bin Al'Aasi, and others, made great conquests, and finally established the Muslim faith on a firm and lasting basis. The details of these successes are admirably told in Muir's 'Annals of the Early Khalifate.'