Seleucid Empire
In 312 BC, Seleucus I Nicator established his base in Babylon after receiving the Mesopotamian regions of Babylonia and Assyria from a regent named Perdiccas. This date marked the beginning of an empire that would stretch across West Asia for nearly two centuries. The Macedonian general had previously served as Commander-in-Chief of the Companion cavalry under Alexander the Great before the ruler's death in 323 BC. Following the Partition of Triparadisus in 320 BC, Seleucus gained control over Babylonia and began expanding ruthlessly to include territories covering modern-day Iraq, Iran, Afghanistan, Syria, and Lebanon. His dominion grew to encompass Anatolia, Persia, the Levant, and parts of Turkmenistan at its height. A bronze bust of Seleucus I Nicator survives today showing him wearing a helmet decorated with leopard skin and bull's horn and ear. He founded Antioch on the Orontes as a new capital, naming it after his father, while establishing Seleucia on the Tigris north of Babylon as an alternative seat of power. After defeating Lysimachus at Corupedion in 281 BC, Seleucus expanded his control to western Anatolia but was assassinated by Ptolemy Ceraunus upon landing in Europe.
In 305 BC, conflict erupted between Seleucus and Chandragupta Maurya, the Indian ruler who had founded the Maurya Empire in 321 BC after conquering the Nanda Empire and their capital Pataliputra in Magadha. By 317 BC, Chandragupta had conquered remaining Greek satraps left by Alexander along the Indus River region. Ancient sources suggest Chandragupta could have fielded a conscript army of 600,000 men and 9,000 war elephants. The details of any pitched battle remain unknown according to historian Jansani, though archaeological evidence shows Mauryan rule extended as far as Kandahar in southern Afghanistan through inscriptions known as the Edicts of Ashoka. A treaty formalized territory west of the Indus including the Hindu Kush, modern-day Afghanistan, and eastern Balochistan province of Pakistan bordering on the Indus. In return for ceding land, Chandragupta sent 500 war elephants to Seleucus, a military asset that would play a decisive role at the Battle of Ipsus in 301 BC. Seleucus dispatched ambassadors Megasthenes and later Deimakos to the Mauryan court at Pataliputra where Megasthenes wrote detailed descriptions of India preserved partly through Diodorus Siculus. Other territories ceded before Seleucus' death included Gedrosia in the south-east of the Iranian plateau and Arachosia on the west bank of the Indus River.
Antiochus III the Great took the throne in 223 BC and initially failed in the Fourth Syrian War against Egypt, suffering defeat at the Battle of Raphia in 217 BC. He spent the next ten years traveling through eastern parts of his domain restoring rebellious vassals like Parthia and Greco-Bactria to nominal obedience. After returning to the west in 205 BC following the death of Ptolemy IV, Antiochus made a pact with Philip V of Macedon to divide Ptolemaic possessions outside Egypt. The Fifth Syrian War saw the Seleucids oust Ptolemy V from control of Coele-Syria, with the Battle of Panium in 200 BC definitively transferring these holdings from Ptolemies to Seleucids. Encouraged by exiled Carthaginian general Hannibal, Antiochus launched an invasion across the Hellespont aiming to establish the empire as foremost power in the Hellenic world. At battles of Thermopylae in 191 BC and Magnesia in 190 BC, Antiochus's forces suffered resounding defeats against Rome and its Greek allies. The Treaty of Apamea signed in 188 BC required the Seleucids to pay large indemnity, retreat from Anatolia, and never again attempt expansion west of Taurus Mountains. The Kingdom of Pergamum and Republic of Rhodes gained former Seleucid lands in Anatolia as Rome's allies. Antiochus died in 187 BC on another expedition east where he sought money to pay the indemnity.
Antiochus IV Epiphanes seized the throne after his brother Seleucus IV Philopator was assassinated by minister Heliodorus between 187 and 175 BC. He attempted restoring Seleucid power through successful war against Ptolemaic Egypt but faced Roman commissioners led by Proconsul Gaius Popillius Laenas who drew a circle in sand around the king's feet demanding immediate reply before stepping out. When the king hesitated astounded at such peremptory order, he replied I will do what the senate thinks right and chose to withdraw rather than set empire to war with Rome again. On return journey according to Josephus, he made expedition to Judea taking Jerusalem by force and spoiling temple interrupting daily sacrifice for three years and six months. Aggravating situation further, Antiochus IV initiated series of religious persecutions culminating in localized revolt in Jerusalem that eventually led to loss of control over Judea paving way for independent Hasmonean kingdom. After death of Antiochus IV Epiphanes in Isfahan in 164 BC, frequent civil wars made central authority tenuous. By 143 BC Jews under Maccabees had fully established independence while Parthian expansion continued as well. In 139 BC Demetrius II was defeated in battle by Parthians and captured, marking time when entire Iranian Plateau lost to Parthian control. Mithridates I of Parthia conquered much remaining eastern lands including Assyria and Babylonia mid-second century BC while independent Greco-Bactrian Kingdom flourished northeast.
By 100 BC once-formidable Seleucid Empire encompassed little more than Antioch and some Syrian cities despite clear collapse of power around them. Nobles continued playing kingmakers regularly with occasional intervention from Ptolemaic Egypt and other outside powers since no nation wished absorb them seeing as they constituted useful buffer between neighbors. Mithridates VI Pontus's ambitious son-in-law Tigranes the Great king of Armenia invaded Syria in 83 BC at invitation of faction in interminable civil wars establishing himself ruler putting empire virtually at end. Following Roman general Lucullus defeat both Mithridates and Tigranes in 69 BC rump Seleucid kingdom restored under Antiochus XIII though civil wars could not prevented as another Seleucid Philip II contested rule. After Roman conquest of Pontus Romans became increasingly alarmed constant source instability Syria under Seleucids. Once Mithridates defeated by Pompey in 63 BC Pompey set about task remaking Hellenistic East creating new client kingdoms establishing provinces. While client nations like Armenia and Judea allowed continue degree autonomy under local kings, Pompey saw Seleucids too troublesome continue doing away both rival Seleucid princes making Syria Roman province.
The domain stretched from Aegean Sea to Afghanistan Pakistan including diverse array cultures ethnic groups Greeks Assyrians Armenians Georgians Persians Medes Mesopotamians Jews living within bounds. Government established Greek cities settlements throughout empire via colonization program encouraging immigration from Greece; both city settlements rural ones created inhabited ethnic Greeks given good land privileges expected serve military service state. Despite tiny minority overall population these Greeks backbone empire loyal committed cause giving vast territory rule overwhelmingly served military government unlike Ptolemaic Egypt where Greeks rarely engaged mixed marriages non-Greeks keeping own cities. Various non-Greek peoples still influenced spread Greek thought culture phenomenon referred Hellenization. Historically significant towns cities such Antioch created renamed Greek names hundreds new cities established trade purposes built Greek style start. Local educated elites needed work government learned Greek language wrote Greek absorbed Greek philosophical ideas took Greek names some practices slowly filtered lower classes. Synthesizing Hellenic indigenous cultural religious philosophical ideas ethnic unity framework established Alexander met varying degrees success resulting times simultaneous peace rebellion various parts empire. In general Seleucids allowed local religions operate undisturbed incorporating Babylonian religious tenets gain support tensions around integration Judaism present reign Seleucid governments though previous governments managed relatively seamless integration Judean religious cultural practices.
Seleucid army fought primarily Greco-Macedonian style main body phalanx large dense formation men armed small shields long pike called sarissa developed Macedonian army reign Philip II Macedon his son Alexander Great. Alongside phalanx Seleucid armies used numerous native mercenary troops supplement Greek forces limited due distance from rulers' Macedonian homeland. Size Seleucid army usually varied between 70,000 and 200,000 manpower. Distance Greece put strain military system primarily based recruitment Greeks key segment army. To increase population Greeks kingdom Seleucid rulers created military settlements two main periods establishment first under Seleucus I Nicator Antiochus I Soter then under Antiochus IV Epiphanes. Military settlers given land varying size according rank arm service settled colonies urban character point acquire status polis settler-soldiers called cleroi maintain land own return serve Seleucid army when called majority settlements concentrated Lydia northern Syria upper Euphrates Media. Antiochus III brought Greeks Euboea Crete Aetolia settled them Antioch. These Greek settlers formed Seleucid phalanx cavalry units picked men kingdom guards regiments rest Seleucid army consist native mercenary troops serving light auxiliary troops. While Seleucids happy recruit less populated outlying parts Empire Arabs Jews Iranian peoples east inhabitants Asia Minor north generally eschewed recruiting native Syrians native Mesopotamians Babylonians presumably desire not train arm people overwhelming majority trade governmental centers empire Antioch Babylon risking revolt.
Currency plays increasingly central role under Seleucids monetization nothing new newly acquired lands introduction widespread implementation currency attributed Darius I tax reforms centuries prior hence Seleucids see continuation rather shift practice payment taxation silver necessary kind. In regard Seleucids notable paying sizeable armies exclusively silver nevertheless two significant developments currency during Seleucid period adoption Attic Standard certain regions popularization bronze coinage. Adoption Attic standard uniform across realm Attic standard already common currency Mediterranean prior Alexander conquest preferred currency foreign transactions coastal regions Seleucids Syria Asia Minor quick adopt new standard Mesopotamia however millennia-old shekel weighing 8.33 g silver prevailed over Attic standard according historian R J van der Spek due particular method recording price favoring bartering monetary transactions. Bronze coinage dating late fifth fourth century popularized fiduciary currency facilitating small-scale exchanges Hellenistic period principally legal tender circulated locales production great Seleucid mint Antioch Antiochus III reign began minting bronze coins weighing 1.25-1.5g serve regional purpose reasons behind remain unclear Spek notes chronic shortage silver Seleucid empire fact Antiochus I heavy withdrawal silver satrap noted Babylonian astronomical diaries purchases Babylon other cities made Greek bronze coins unprecedented official documents bronze coins played part sign hardship low denomination bronze coinage meant used tandem bartering making popular successful medium exchange.
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Common questions
When did Seleucus I Nicator establish the Seleucid Empire?
Seleucus I Nicator established the Seleucid Empire in 312 BC after receiving Babylonia and Assyria from Perdiccas. This date marked the beginning of an empire that stretched across West Asia for nearly two centuries.
What territories did the Seleucid Empire cover at its height?
The Seleucid Empire encompassed Anatolia, Persia, the Levant, parts of Turkmenistan, modern-day Iraq, Iran, Afghanistan, Syria, and Lebanon. The domain stretched from the Aegean Sea to Afghanistan Pakistan including diverse array cultures ethnic groups Greeks Assyrians Armenians Georgians Persians Medes Mesopotamians Jews living within bounds.
How did Antiochus III the Great lose control over western Anatolia?
Antiochus III the Great lost control over western Anatolia after suffering resounding defeats against Rome and its Greek allies at battles of Thermopylae in 191 BC and Magnesia in 190 BC. The Treaty of Apamea signed in 188 BC required the Seleucids to pay large indemnity, retreat from Anatolia, and never again attempt expansion west of Taurus Mountains.
When did the Seleucid Empire end under Roman rule?
Pompey set about task remaking Hellenistic East creating new client kingdoms establishing provinces once Mithridates defeated by Pompey in 63 BC. Pompey saw Seleucids too troublesome continue doing away both rival Seleucid princes making Syria Roman province.
What was the structure of the Seleucid army during the empire's existence?
The Seleucid army fought primarily Greco-Macedonian style main body phalanx large dense formation men armed small shields long pike called sarissa developed Macedonian army reign Philip II Macedon his son Alexander Great. Size Seleucid army usually varied between 70,000 and 200,000 manpower alongside numerous native mercenary troops supplement Greek forces limited due distance from rulers' Macedonian homeland.