largely Semitic, Tyre and Sidon as of old were the great Mediterranean ports and Semitic shipping plied upon the seas. But many of these Semitic merchants and business people as they went from place to place already found a sympathetic and convenient common history in the Hebrew tradition and the Hebrew scriptures. A new element which was increasing rapidly in this empire was the Greek element. The Greeks were becoming serious rivals to the Semites upon the sea, and their detached and vigorous intelligence made them useful and, unprejudiced officials.
It was on account of the Scythians that Darius I invaded Europe. He wanted to reach South Russia, the homeland of the Scythian horsemen. He crossed the Bosphorus with a great army and marched through Bulgaria to the Danube, crossed this by a bridge of boats and pushed far northward. His army suffered terribly. It was largely an infantry force and the mounted Scythians rode all round it, cut off its supplies, destroyed any stragglers and never came to a pitched battle. Darius was forced into an inglorious retreat.
He returned himself to Susa but he left an army in Thrace and Macedonia, and Macedonia submitted to Darius. Insurrections of the Greek cities in Asia followed this failure, and the European Greeks were