But at the beginning of spring the other generals were deposed by the king from their offices, and Mardonius son of Gobryas, a man young in years and recently married to Darius' daughter Artozostre, came down to the coast at the head of a very great army and fleet. When Mardonius reached Cilicia at the head of this army, he himself embarked on shipboard and sailed with the rest of his ships, while other captains led the land army to the Hellespont. When Mardonius arrived in Ionia in his voyage along the coast of Asia, he did a thing which I here set down for the wonder of those Greeks who will not believe Otanes to have declared his opinion among the Seven that democracy was best for Persia: Mardonius deposed all the Ionian tyrants and set up democracies in their cities. He did this and hurried to the Hellespont. When a great multitude of ships and a great army were assembled, the Persians crossed the Hellespont on shipboard and marched through Europe, with Eretria and Athens as their goal.