Familiar with the politics and institutions of Egypt, yet, as a semi-Libyan, devoid of Egyptian prejudices, and full of the ambition which naturally inspires young princes of a vigorous stock, Psamatik had at once the desire to shake off the yoke of Assyria, and reunite Egypt under his own sway, and also a willingness to adopt any means, however new and strange, by which such a result might be accomplished. He had probably long watched for a favourable moment at which to give his ambition vent, and found it at last in the circumstances that ushered in the second half of the seventh century. Assyria was, about B.C. 651, brought into a position of great difficulty, by the revolt of Babylon in alliance with Elam, and was thus quite unable to exercise a strict surveillance over the more distant parts of the Empire. The garrison by which she held Egypt had probably been weakened by the withdrawal of troops for the defence of Assyria Proper; at any rate, it could not be relieved or strengthened under the existing circumstances. At the same time a power had grown up in Asia Minor, which was jealous of Assyria, having lately been made to tremble for its independence. Gyges of Lydia had, in a moment of difficulty, been induced to acknowledge himself Assyria's subject; but he had emerged triumphant from the perils surrounding him, had reasserted his independent authority, and was anxious that the power of Assyria should be, as much as possible, diminished. Psamatik must have been aware of this. Casting his eyes around the political horizon in search of any ally at once able and willing to lend him aid, he fixed upon Lydia as likely to be his best auxiliary, and dispatched an embassy into Asia Minor. Gyges received his application favourably, and sent him a strong Asiatic contingent, chiefly composed of Ionians and Carians. Both races were at this time warlike, and wore armour of much greater weight and strength than any which the Egyptians were accustomed to carry. It was in reliance, mainly, on these foreigners, that Psamatik ventured to proclaim himself "King of the Two Countries," and to throw out a gage of defiance at once to his Assyrian suzerain and to his nineteen fellow-princes.