DARIUS AND THE SCYTHIANS. Tue conquest of Asia Minor by Cyrus and his Persian army was the first step towards that in- vasion of Greece by the Persians which proved such a vital element in the history of the Hellenic people. The next step was taken in the reign of Darius, the first of Asiatic monarchs to invade Kurope. This ambitious warrior attempted to win fame by conquering the country of the Scythian barbarians,—now Southern Russia,—and was taught such a lesson that for centuries thereafter the peril- ous enterprise was not repeated. It was about the year 516 n.c. that the Persian king, with the ostensible purpose—invented to ex- cuse his invasion—of punishing the Scythians for a raid into Asia a century before, but really moved only by the thirst for conquest, reached the Bos- phorus, the strait that here divides Europe from Asia. He had with him an army said to have numbered seven hundred thousand men, and on the seas was a fleet of six hundred ships. A bridge of boats was thrown across this arm of the sea,—on which Constantinople now stands,—and the great Persian host reached European soi! in the country of Thrace. 117