Answer 1
The Persian Empire expanded, as was typical for the period, by conquering the territories of neighboring states and annexing them to the Persian Empire. Once these territories were conquered, the Persians appointed many former governors from the defeated regime into positions of authority in the new province or satrapi. As a condition of surrender, the army of the defeated state was incorporated into the overall Persian army, resulting in a Persian army that became larger and larger every time a country was defeated.
While Persia was certainly a Dictatorship, non-Persians in the empire were allowed a degree of religious and cultural tolerance that many modern countries have not even acceded.
Answer 2
First they took over their previous overlord Media, then with the Medes as allies they took over the Babylonian Empire, From there they spread into Asia Minor and Thrace, and to Libya and Egypt in Africa. In the east they took Central Asia and today's Pakistan. They then consolidated the empire by dividing it into 20 provinces (satrapies) with a governor in control responsible to the king and his council.
They left local government in place and established Persian provincial governors to oversee them, maintain internal and external security, organise taxes; the king and his council oversaw the provincial governors.
By first incorporating the Medes, their earlier ruler, then using this combined strength to take over Babylonia, and then incorporating the Middle East, North Africa and Central Asia using this growing strength.
They also used the local rulers to continue ruling locally with Persian provincial governors to organise internal and external defence and collect taxes.
They established 20 provinces each with a Persian governor responsible for security and increasing prosperity, overseen by the king and his council. Local government remained in local control.
By conquest and establishing stable government and internal and external security.
An empire stretching from Libya to Central Asia.
The peoples of northeast Africa, the Middle East and Central Asia
Gaining an empire is its own reward.
The Persians absorbed the Phoenicians into their empire, and used their resources.
Persians
No.
The Persians
They used Persian financial support to build a fleet to gain victory over the Athenian empire in the Peloponnesian War.
Alexander the Great conquered the Persian Empire and converted it into an empire of his own, not to destroy the Persians but to convert them to Greek culture.
The Persians conquered the Babylonian Empire in 539 BCE.
He was not mean to the Persians - he led them to form the greatest empire of the time.
It expanded the Persians.