Seleucid Empire


published on 28 April 2011
Map of the Successor Kingdoms, c. 303 BCE (Javierfv1212)

The Seleucid Empire was the Persian kingdom of the Macedonian dynasty of the Seleucids, whose rule began with the collapse of Alexander's empire and faded away between Roman and Parthian growth of power in the 1st century BCE.

The Seleucid Empire began when Seleucos I, one of Alexander the Great's former favorite companions, was given the satrapy of Babylon in the second division of the empire in 321 BCE. He first ruled it briefly until 315 BCE, when he was forced to flee to Egypt under pressure of Antigonos. There he prepared his revenge with the help of Ptolemy, and succeeded to retake Babylon after the battle of Gaza in 305 BCE. He also inherited the Asian part of Antigonos' vast empire after its final fall at the battle of Ipsos in 301 BCE. Having secured Antigonos' kingdom's eastern part, Seleucos managed to reconquer most of Alexander's empire, defeating Lysimachos and Demetrios. He was, however, murdered in 281 BCE on the eve of his success by the man he supported on the Egyptian throne, Ptolemy Keraunos.

Remove Ads


After the death of Seleucos, things became worse for his successors. During the successive reigns of Antiochos I, Antiochos II, Seleucos II and Seleucos III, the empire struggled, due to rebellions of Bythinia, Pergammum, Bactria and Parthia, and the first indecisive Syrian wars against the Ptolemies. Internal struggles began during this time, which continued until the empire's end. The Seleucids also had to fight the Galatians who devastated Anatolia, and also against rebellious elements at all levels.

During the successive reigns of Antiochos I, Antiochos II, Seleucos II and Seleucos III, the empire struggled due to rebellions.

It is this disorganized and problematic empire that the eighteen year-old Antiochos III inherited in 223 BCE. Over the next 25 years he subdued most of the rebellious states in a great tour de force: He made his anabasis (difficult retreat) in the east successfully fighting Parthians and Bactrians, made a profitable treaty with the Indian ruler Sophagasenos and confirmed his superiority on rebellious subjects. He also made an expedition against the Gerrhaeans of the East Arabian coast in 204 BCE and defeated the Ptolemies twice which allowed him to take control of the highly valued Koile Syria near 198 BCE.

Regrettably, he also led a war against Rome in the wake of his expansion in Anatolia, and despite the wise advice of the Carthaginian Hannibal Barca, which he decided not to follow, he was defeated at the Battle of Magnesia ad Sipylum in 190 BCE. The consequences of the disastrous peace treaty which followed led the kingdom into ruin, and Antiochos III died in 187 BCE during a campaign in the East.

Remove Ads


Antiochus VIII Grypos

Antiochos III's death marked the end of the Seleucid Empire as a great power. The kingdom fell once more into dynastic struggles, and the eastern provinces were gradually lost due to rebellions and Parthian expansion. Much worse was the Roman interference in the Empire, largely influencing the dynastic quarrels and foreign policy, such as in 168 BCE when the Romans forced Antiochos IV to withdraw from the only successful Seleucid campaign in Egypt. The wild intrigues which characterized the last decades of the Seleucid Empire were ended by the invasion of the Armenian king Tigranes II in 83 BCE. Even if after Tigranes some rulers of Syria claimed to be Seleucid kings, they were no more than Roman vassals.

The Seleucid legacy in Asia was strong, because Hellenism was established in Asia during two centuries of Seleucid rule. The method of dating years in Asia, for example, was called the Seleucid Era, beginning at the return of Seleucos I to Babylon in 311 BCE, which was continued to be used as late as the 6th century CE. In fact, the Seleucid legacy lasted throughout Roman, Parthian and Sassanid dominion until the Arabian invasions of the 7th century CE introduced Islam.

Remove Ads



About the Author

Antoine Simonin
Passionate about ancient Central Asia. Maintains the website From Bactria to Taxila. Works in the Europa Barbarorum project.

Editorial Review

Our editorial team reviews every submission for accuracy, reliability and adherence to academic standards, while being easy to read with students and the general public in mind.

Remove Ads


Help us write more

We're a small non-profit organisation run by a handful of volunteers. Each article costs us about $50 in history books as source material, plus editing and server costs. You can help us create even more free articles for as little as $5 per month, and we'll give you an ad-free experience to thank you! Become a Member

Recommended Books


Cite This Work

APA Style

Simonin, A. (2011, April 28). Seleucid Empire. Ancient History Encyclopedia. Retrieved from

Chicago Style

Simonin, Antoine. "Seleucid Empire." Ancient History Encyclopedia. Last modified April 28, 2011.

MLA Style

Simonin, Antoine. "Seleucid Empire." Ancient History Encyclopedia. Ancient History Encyclopedia, 28 Apr 2011. Web. 25 Feb 2018.

Remove Ads


Add Event


Visual Timeline
  • 321 BCE - 315 BCE
    Seleucos rules the satrapy of Babylon.
  • 312 BCE
    Seleucos conquers Babylon and founds the Seleucid dynasty.
  • 312 BCE
    Evagros is killed in battle by Seleucos I. Persis comes under Seleucid rule.
  • 305 BCE
    Emperor Changragupta signs a treaty with Seleucos I, establishing borders and giving the Punjab to Chandragupta in return for 500 war elephants.
  • c. 304 BCE - 64 BCE
    Rule of the Seleucids in Mesopotamia.
  • 301 BCE
    Battle of Ipsos. Death of Antigonos, rise to power of Lysimachus and Seleucus.
  • 301 BCE - 299 BCE
    Antioch was founded by Seleucos I Nikator.
  • 280 BCE
    Lydia becomes a part of the Seleucid Empire.
  • 275 BCE
    Seleucids successfully defeat the Galatian Celts in the 'Elephant Battle'.
  • 274 BCE - 271 BCE
    The first Syrian war, marking the beginning of the contest between the Ptolemies and the Seleucids for Phoenicia and Coele-Syria.
  • 262 BCE
    Eumenes rebels and wins against the Seleucid Antiochos I. Beginning of the Pergamon Empire.
  • 261 BCE
    Antiochus, king of the Seleucid empire, is killed in battle against the Galatians at Ephesus in Asia Minor.
  • 250 BCE
    Former satrap Diodotos rebels against Seleucid king Antiochos I, creating the Greco-Bactrian kingdom.
  • 246 BCE
    Galatians defeat Seleucus II in a battle near Ancyra.
  • 210 BCE - 204 BCE
    Anabasis of Antiochos III in the East.
  • 203 BCE
    The Seleucid king, Antiochus III Megas signs an alleged treaty with Philip V of Macedon to divide Egypt and its overseas possessions between them.
  • c. 195 BCE
    After the battle at Panion, the Seleucids finally take the rule of Phoenicia from the Ptolemies. Tyre and the other Phoenician cities will remain in the Seleucid power until the Roman conquest of Syria.
  • 195 BCE
    Facing the threat of being handed to the Romans as a result of the opposition to the reforms he initiated in Carthage, Hannibal flees to Crete and then to Tyre, in Seleucid territory. He will become one of the military advisors of king Antiochos III Megas in his war against Rome.
  • 190 BCE
    Battle of Magnesia ad Sipylum, disastrous defeat for Antiochos III against Romans.
  • c. 189 BCE
    The treaty of Apameea Kibotos. Peace and alliance is established between the Seleucid Kingdom and Rome joined by her allies, such as Pergamon and Rhodes. The Seleucids have to evacuate all the land and the cities from Asia Minor and to pay a huge war indemnity.
  • 141 BCE
    Persis passes from Seleucid to Parthian domination.
  • 83 BCE
    Tigranes II invades and destroys the Seleucid Empire.
  • 64 BCE
    The Roman general Pompey defeats the Seleucid Antiochus XIII and incorporates Syria as a province of the Roman empire.
  • 190 CE
    Side freed from Seleucid control.
Remove Ads



Our latest articles delivered to your inbox, once a week:

Remove Ads


Visit our Shop

Ancient History Merchandising