**5. PERSIAN EMPIRE
The theocratic monarchy, whose king was considered the personification of god,
occupied since the middle of II millennium B.C. the present territory of Iran, and extended immensely from northern Greece to the Indus, including Thrace, the
Middle East, Asia Minor and the Caucasus.Its army was one of the most
powerful of antiquity. The king had
a personal army of 10,000 soldiers, known as "THE IMMORTAL",
since each time one fell; another immediately replaced him.
This empire weakened after losing the medical wars against the
Greeks and was later reduced and conquered by Alexander the Great
(353-323 B.C.) At the end, it happened at the hands of the Roman Empire