Parthian Empire - History of Ancient Parthia
Non-commercial, educational website dedicated to the history and coins of ancient Parthia with sections on geography and resources. Includes a large bibliography directly concerned with Parthia.

The Persian Wars
Concise description of events during the Persian wars from Croesus to Plataea. Part of a course History of Western Civilization by Dr. Ellis L. Knox, Boise State University.

Darius III Codomannus
A tribute to the Persian king defeated by Alexander the Great at Gaugamela in 331 BC. Images, biographical and analytical articles and links to ancient Persia available.