Answer:
Darius led military campaigns in Europe, Greece, and even in the Indus valley, conquering lands and expanding his empire.
Explanation:
His reign lasted 36 years, from 522 to 486 BCE; during this time the Persian Empire reached its peak. Darius I improved the Persian government by dividing the Persian Empire into provinces and implementing numerous construction projects. Theses projects included the construction of a new capital at Persepolis and roads throughout the empire.
