Mazaeus was a Persian

Achaemenid Empire

The Achaemenid Empire , sometimes known as First Persian Empire and/or Persian Empire, was founded in the 6th century BCE by Cyrus the Great who overthrew the Median confederation...

 noble and governor of Babylon

Babylon

Babylon was an Akkadian city-state of ancient Mesopotamia, the remains of which are found in present-day Al Hillah, Babil Province, Iraq, about 85 kilometers south of Baghdad...

.

He was the second to last satrap

Satrap

Satrap was the name given to the governors of the provinces of the ancient Median and Achaemenid Empires and in several of their successors, such as the Sassanid Empire and the Hellenistic empires....

 (governor) of Cilicia

Cilicia (satrapy)

Cilicia was a satrapy of the Achaemenid Empire, with its capitol at Tarsus. It was conquered sometime in the 540's by Cyrus the Great. Cilicia was a vassal, and although it had a vassal king had to pay a tribute of 360 horses and 500 talents of silver, according to Herodotus...

. Shortly aftwards, his successor was expelled by Alexander the Great.

At the Battle of Gaugamela

Battle of Gaugamela

The Battle of Gaugamela took place in 331 BC between Alexander the Great and Darius III of Persia. The battle, which is also called the Battle of Arbela, resulted in a massive victory for the ancient Macedonians and led to the fall of the Achaemenid Empire.-Location:Darius chose a flat, open plain...

 Mazaeus commanded the right flank with the Syria

Syria

Syria , officially the Syrian Arab Republic , is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the West, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest....

n, Media

Medes

The MedesThe Medes...

n, Mesopotamia

Mesopotamia

Mesopotamia is a toponym for the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran.Widely considered to be the cradle of civilization, Bronze Age Mesopotamia included Sumer and the...

n, Parthia

Parthia

Parthia is a region of north-eastern Iran, best known for having been the political and cultural base of the Arsacid dynasty, rulers of the Parthian Empire....

n, Sacian, Tapurian, Hyrcania

Hyrcania

Hyrcania was the name of a satrapy located in the territories of present day Gilan, Golestan, Mazandaran and part of Turkmenistan, lands south of the Caspian Sea. To the Greeks, the Caspian Sea was the "Hyrcanian Sea".-Etymology:...

n, Albania

Caucasian Albania

Albania is a name for the historical region of the eastern Caucasus, that existed on the territory of present-day republic of...

n, Sacesinian, Cappadocia

Cappadocia

Cappadocia is a historical region in Central Anatolia, largely in Nevşehir Province.In the time of Herodotus, the Cappadocians were reported as occupying the whole region from Mount Taurus to the vicinity of the Euxine...

n, and Armenia

Armenia

Armenia , officially the Republic of Armenia , is a landlocked mountainous country in the Caucasus region of Eurasia...

n cavalry.

Stateira II

Stateira II

Stateira II , possibly also known as Barsine, was the daughter of Stateira I and Darius III of Persia. After her father's defeat at the Battle of Issus, Stateira and her sisters became captives of Alexander of Macedon. They were treated well, and she became Alexander's second wife at the Susa...

 was originally bethrothed to him, but he died too early. She was eventually married to Alexander.

It is thought that the Alexander Sarcophagus

Alexander Sarcophagus

The Alexander Sarcophagus is a late 4th century BC stone sarcophagus adorned with bas-relief carvings of Alexander the Great. The work is remarkably well preserved and has been celebrated for its high aesthetic achievement...

was actually dedicated to him.