19. Q. In what famous battle were the Persians defeated on a second expedition against Greece? A. The battle of Marathon, the victorious forces being commanded by Miltiades.

20. Q. After the death of Miltiades what two generals associated with him at Marathon came to be the leading men in Athens? A. Themistocles and Aristides.

21. Q. Under whom was the third invasion of Greece by the Persians attempted? A. Under Xerxes, the son and successor of Darius, with over a million soldiers.

22. Q. At what place were the Persian hosts held in check by a small band of Greeks under Leonidas, a Spartan? A. At the pass of Thermopylæ.

23. Q. On the third day, a traitor having pointed out a mountain path by which the Persians gained the rear of the Greeks, what was the fate of Leonidas? A. He, with three hundred Spartans and seven hundred Thespians, perished, fighting to the last.

24. Q. What leading city of Greece did the army of Xerxes burn? A. Athens.

25. Q. In what naval contest were the Persians soon after totally defeated? A. The battle of Salamis.

26. Q. On the same day of the battle of Salamis what contest occurred at the island of Sicily? A. The battle of Himera, in which the Carthaginian forces under Hamilcar were utterly routed by Gelo, the tyrant of Syracuse.

27. Q. In the following year what land and what naval battles gave the final death blow to the Persian rule in Europe? A. Platæa and Mycale.

28. Q. What league was formed to keep the Persians out of the Ægean? A. A league called the Confederation of Delos, the different states annually contributing to Athens a certain number of ships, or a fixed sum of money for the support of the navy.