Lead: On the plain at Marathon, Greek armies met a much larger Persian invasion force. For a time, the outcome was in doubt.

Intro.: "A Moment In Time" with Dan Roberts.

Content: In 500 BCE the Persian Empire stretched from India to the shores of the Black Sea. From their capital at Persepolis, Cyrus the Great and his successors, Darius and Xerxes, extended the borders and generally benevolent rule of Persia to most of the civilized world. As they moved west the Persians began to encounter those regions colonized by the major city-states of Greece.