This map shows the extent of the Persian Empire in around 500 B.C. under Darius.
The Historical Atlas by William R. Shepherd, 1923.
Persian Empire Map - 500 B.C.
The Persian Empire in the time of Darius I extended to the African areas of Egypt and Libya to the south and west, Macedon and Thrace to the North and west, and to the Indus River in the East. From the Perry-Castaņeda Library
Map Collection
Historical Maps.