Thus encouraged in his purpose, Croesus prepared to make war upon Persia. But he had miscalculated the strength and activity of his enemy. Cyrus marched across the Halys, defeated the Lydian army in the field, and after a short siege captured Sardis; and Lydia became a province of the new Persian empire. [Illustration: TOMB OF CYRUS THE GREAT. (Present Condition.)] There is a story which tells how Cyrus had caused a pyre to be erected on which to burn Croesus, but at the last moment was struck by hearing the unfortunate monarch repeatedly call the name of Solon. Seeking the meaning of this, he was told that Croesus in his prosperous years was visited by the Greek sage Solon, who, in answer to the inquiry of Croesus as to whether he did not deem him a happy man, replied, "Count no man happy until he is dead." Cyrus was so impressed with the story, so the legend tells, that he released the captive king, and treated him with the greatest kindness. This war between Croesus and Cyrus derives a special importance from the fact that it brought the Persian empire into contact with the Greek cities of Asia, and thus led on directly to that memorable struggle between Greece and Persia known as the Græco-Persian War. Tradition says that Cyrus lost his life while leading an expedition against some Scythian tribes in the north. He was buried at Pasargadæ, the old Persian capital, and there his tomb stands to-day, surrounded by the ruins of the magnificent buildings with which he adorned that city. The following cuneiform inscription may still be read upon a pillar near the sepulchre: "I am Cyrus, the king, the Akhæmenian." Cyrus, notwithstanding his seeming love for war and conquest, possessed a kindly and generous disposition. Almost universal testimony has ascribed to him the purest and most beneficent character of any Eastern monarch. REIGN OF CAMBYSES (529-522 B.C.).--Cyrus the Great left two sons, Cambyses and Smerdis: the former, as the oldest, inherited the sceptre, and the title of king. He began a despotic and unfortunate reign by causing his brother, whose influence he feared, to be secretly put to death. With far less ability than his father for their execution, Cambyses conceived even vaster projects of conquest and dominion. Asia had hitherto usually afforded a sufficient field for the ambition of Oriental despots. Cambyses determined to add the country of Africa to the vast inheritance received from his father. Upon some slight pretext, he invaded Egypt, captured Memphis, and ascended the Nile to Thebes. From here he sent an army of fifty thousand men to subdue the oasis of Ammon, in the Libyan desert. Of the vast host not a man returned from the expedition. It is thought that the army was overwhelmed and buried by one of those fatal storms, called simooms, that so frequently sweep over those dreary wastes of sand.