Some of the European biographers of Mohammad say, "that the first aggressions after the Hegira were solely on the part of Mahomet and his followers. It was not until several of their caravans had been waylaid and plundered, and blood had thus been shed, that the people of Mecca were forced in self-defence to resort to arms."[175] This is not correct. The aggressors, in the first instance, were the Koreish, who, as already shown, followed up their persecution of the Moslems by an attack upon the city in which the Prophet and his followers had taken refuge. Even taking it for granted that the Moslems were the first aggressors after the Hegira, was not the Hegira, or expulsion itself (leaving aside the previous persecutions and oppressions at Mecca), a sufficient reason for the commencement of hostilities by the Moslems, who were anxious to secure their moral and religious freedom, and to protect themselves and their relatives from further aggressions? Sir William Muir admits, that "hostilities, indeed, were justified by the 'expulsion' of the believers from Mecca."[176] "It may be said," says Major Vans Kennedy, "that, in these wars, Mohammad was the aggressor by his having, soon after his flight, attempted to intercept the caravans of Mecca. But the first aggression was, undoubtedly, the conspiracy of the Koreish to assassinate Mohammad, and when to save his life he fled from Mecca, himself and his followers were thus deprived of their property, and obliged to depend for their subsistence on the hospitality of the men of Medina, it could not be reasonably expected that they would allow the caravans of their enemies to pass unmolested."[177] [Sidenote: 21. The alleged instances examined.] There is no proof that Mohammad, after the Hegira, commenced hostilities against the Koreish by intercepting their caravans. The alleged instances of the caravans being waylaid by the Moslems at Medina are not corroborated by authentic and trustworthy traditions. They have also internal evidences of their improbability. The Medina people had pledged themselves only to defend the Prophet from attack, and not to join him in any aggressive steps against the Koreish.[178] Therefore, it seems impossible that they should have allowed Mohammad to take any aggressive steps against the Koreish which would have involved them in great trouble. [Sidenote: 22. Hamza and Obeida expedition.] The alleged expeditions against the Koreish caravans by Hamza and the other by Obeida in pursuit of caravans which escaped, are in themselves improbable. Mohammad would not send fifty or sixty persons to waylay a caravan guarded by two or three hundred armed men. [Sidenote: 23. The Abwa, Bowat, & Osheira expeditions.]