Partition of Alexander's empire Alexander, who quickly conquered the
Persian Empire under its last Achaemenid dynast,
Darius III, died young in 323 BC, leaving an expansive empire of partly Hellenised culture without an adult heir. The empire was put under the authority of a regent,
Perdiccas, and the vast territories were divided among Alexander's generals, who thereby became
satraps at the
Partition of Babylon, all in that same year.
Rise of Seleucus Alexander's generals, known as diadochi|, jostled for supremacy over parts of his empire following his death.
Ptolemy I Soter, a former general and then current satrap of
Egypt, was the first to challenge the new system, which eventually led to the demise of Perdiccas. Ptolemy's revolt created a new subdivision of the empire with the
Partition of Triparadisus in 320 BC.
Seleucus, who had been "Commander-in-Chief of the
Companion cavalry" () and appointed first or court
chiliarch (which made him the senior officer in the Royal Army after the regent and commander-in-chief Perdiccas since 323 BC, though he helped to assassinate him later) received
Babylonia and, from that point, continued to expand his dominions ruthlessly. Seleucus established himself in
Babylon in 312 BC, the year later used as the
foundation date of the Seleucid Empire.
Babylonian War (311–309 BC) The rise of Seleucus in Babylon threatened the eastern extent of the territory of
Antigonus I Monophthalmus in Asia. Antigonus, along with his son
Demetrius I Poliorcetes, unsuccessfully led a campaign to annex Babylon. The victory of Seleucus ensured his claim of Babylon and legitimacy. He ruled not only Babylonia, but the entire enormous eastern part of Alexander's empire, as described by the historian
Appian:
Seleucid–Mauryan War (305–303 BC) Chandragupta Maurya (
Sandrokottos) founded the
Maurya Empire in 321 BC after the
conquest of the
Nanda Empire and their capital
Pataliputra in
Magadha. Chandragupta then redirected his attention to the
Indus River region, and by 317 BC, he conquered the remaining Greek
satraps left by Alexander. Expecting a confrontation, Seleucus gathered his army and marched to the Indus. It is said that Chandragupta could have fielded a
conscript army of 600,000 men and 9,000 war elephants. According to Appian, While the Greek sources have been interpreted by some as a Mauryan victory, the details of the conflict, and if there was in fact a
pitched battle, are unknown, and Jansani warns that "there are very little details about the battle or skirmish they fought, and that none of the ancient authors depicted either Seleucus or Chandragupta as the clear victor of this battle. This lack of information about the encounter and the ensuing treaty means that it is impossible to reconstruct them." Wheatley and Heckel suggest that the degree of friendly Maurya-Seleucid relations established after the war implies that the hostilities were probably "neither prolonged nor grievous". Chandragupta received, formalized through a treaty, territory west of the Indus, including the
Hindu Kush, modern day
Afghanistan, and the eastern part of
Balochistan province of
Pakistan, bordering on the Indus. Archaeologically, concrete indications of Mauryan rule, such as the inscriptions of the
Edicts of Ashoka, are known as far as
Kandahar in southern Afghanistan. . a military asset which would play a decisive role at the
Battle of Ipsus in 301 BC. In addition to this treaty, Seleucus dispatched an ambassador,
Megasthenes, to Chandragupta, and later
Deimakos to his son
Bindusara, at the Mauryan court at
Pataliputra (modern
Patna in
Bihar state). Megasthenes wrote detailed descriptions of India and Chandragupta's reign, which have been partly preserved to us through
Diodorus Siculus. Later
Ptolemy II Philadelphus, the ruler of
Ptolemaic Egypt and contemporary of
Ashoka the Great, is also recorded by
Pliny the Elder as having sent an ambassador named
Dionysius to the Mauryan court. Other territories ceded before Seleucus' death were
Gedrosia in the south-east of the Iranian plateau, and, to the north of this,
Arachosia on the west bank of the
Indus River.
Westward expansion , showing the king wearing a helmet decorated with leopard skin and bull's horn and ear.|alt= Following his and
Lysimachus' decisive victory over Antigonus at the
Battle of Ipsus in 301 BC, Seleucus took control over eastern
Anatolia and northern
Syria. In the latter area, he founded a new capital at
Antioch on the Orontes, a city he named after his father. An alternative capital was established at
Seleucia on the Tigris, north of Babylon. Seleucus's empire reached its greatest extent following his defeat of his erstwhile ally, Lysimachus, at
Corupedion in 281 BC, after which Seleucus expanded his control to encompass western Anatolia. He hoped further to take control of Lysimachus's lands in Europe – primarily
Thrace and even
Macedonia itself, but was assassinated by
Ptolemy Ceraunus on landing in Europe. His son and successor,
Antiochus I Soter, was left with an enormous realm consisting of nearly all of the Asian portions of the Empire, but faced with
Antigonus II Gonatas in Macedonia and
Ptolemy II Philadelphus in Egypt, he proved unable to pick up where his father had left off in conquering the European portions of Alexander's empire.
Breakup of Central Asian territories , who asserted independence to form the
Greco-Bactrian kingdom . Greek legend reads: ,
Basileōs Diodotou, "of King Diodotus." ruler
Vahbarz (Oborzos), thought to have initiated the independence of
Persis from the Seleucid Empire. The coin shows on the reverse an Achaemenid king slaying an armoured, possibly Greek, soldier. This possibly refers to the events related by
Polyainos (Strat. 7.40), in which Vahbarz (Oborzos) is said to have killed 3000 Seleucid settlers.
Revival (223–191 BC) . Reverse shows
Apollo seated on
omphalos holding bow and arrow. Greek legend reads: ,
Basileōs Antiochou, "of King Antiochus." and
Greece). A revival would begin when Seleucus II's younger son,
Antiochus III the Great, took the throne in 223 BC. Although initially unsuccessful in the
Fourth Syrian War against Egypt, which led to a defeat at the
Battle of Raphia (217 BC), Antiochus would prove himself to be the greatest of the Seleucid rulers after Seleucus I himself. He spent the next ten years on his
anabasis (journey) through the eastern parts of his domain and restoring rebellious vassals like Parthia and
Greco-Bactria to at least nominal obedience. He gained many victories such as the
Battle of Mount Labus and
Battle of the Arius and
besieged the Bactrian capital. He even emulated Seleucus with an expedition into India where he met with King
Sophagasenus () receiving war elephants, perhaps in accordance of the existing treaty and alliance set after the Seleucid-Mauryan War. Actual translation of Polybius 11.34 (No other source except Polybius makes any reference to Sophagasenus): When he returned to the west in 205 BC, Antiochus found that with the death of
Ptolemy IV, the situation now looked propitious for another western campaign. Antiochus and
Philip V of Macedon then made a pact to divide the Ptolemaic possessions outside of Egypt, and in the
Fifth Syrian War, the Seleucids ousted
Ptolemy V from control of
Coele-Syria. The
Battle of Panium (200 BC) definitively transferred these holdings from the Ptolemies to the Seleucids. Antiochus appeared, at the least, to have restored the Seleucid Kingdom to glory.
Expansion into Greece and war with Rome and
Rhodes, after the defeat of
Antiochus III by Rome. Circa 188 BC.|250x250px Following the defeat of his erstwhile ally
Philip by Rome in 197 BC, Antiochus saw the opportunity for expansion into Greece itself. Encouraged by the exiled
Carthaginian general
Hannibal, and making an alliance with the disgruntled
Aetolian League, Antiochus launched an invasion across the
Hellespont. With his huge army he aimed to establish the Seleucid Empire as the foremost power in the Hellenic world, but these plans put the empire on a collision course with the new rising power of the Mediterranean, the
Roman Republic. At the battles of
Thermopylae (191 BC) and
Magnesia (190 BC), Antiochus's forces suffered resounding defeats, and he was compelled to make peace and sign the
Treaty of Apamea (188 BC), the main clause of which saw the Seleucids agree to pay a large indemnity, to retreat from
Anatolia and to never again attempt to expand Seleucid territory west of the
Taurus Mountains. The
Kingdom of Pergamum and the
Republic of Rhodes, Rome's allies in the war, gained the former Seleucid lands in Anatolia. Antiochus died in 187 BC on another expedition to the east, where he sought to extract money to pay the indemnity.
Roman power, Parthia and Judea ,'' a bronze statue originally thought to be a Seleucid, or
Attalus II of
Pergamon, now considered a portrait of a Roman general, made by a Greek artist working in Rome in the 2nd century BC. The reign of his son and successor
Seleucus IV Philopator (187–175 BC) was largely spent in attempts to pay the large indemnity, and Seleucus was ultimately assassinated by his minister
Heliodorus. Seleucus' younger brother,
Antiochus IV Epiphanes, now seized the throne. He attempted to restore Seleucid power and prestige with a successful war against the old enemy,
Ptolemaic Egypt, which met with initial success as the Seleucids defeated and drove the Egyptian army back to
Alexandria itself. As the king planned on how to conclude the war, he was informed that Roman commissioners, led by the
Proconsul Gaius Popillius Laenas, were near and requesting a meeting with the Seleucid king. Antiochus agreed, but when they met and Antiochus held out his hand in friendship, Popilius placed in his hand the tablets on which was written the decree of the senate and told him to read it. The decree demanded that he should abort his attack on Alexandria and immediately stop waging the war on Ptolemy. When the king said that he would call his friends into council and consider what he ought to do, Popilius drew a circle in the sand around the king's feet with the stick he was carrying and said, "Before you step out of that circle give me a reply to lay before the senate." For a few moments he hesitated, astounded at such a peremptory order, and at last replied, "I will do what the senate thinks right." He then chose to withdraw rather than set the empire to war with Rome again. On his return journey, according to
Josephus, he made an expedition to
Judea, took
Jerusalem by force, slew a great many who had favored
Ptolemy, sent his soldiers to plunder them without mercy. He also spoiled the
temple, and interrupted the constant practice of offering a daily sacrifice of expiation, for three years and six months. The latter part of his reign saw a further disintegration of the Empire despite his best efforts. Weakened economically, militarily and by loss of prestige, the Empire became vulnerable to rebels in the eastern areas of the empire, who began to further undermine the empire while the Parthians moved into the power vacuum to take over the old Persian lands. Antiochus' aggressive Hellenizing (or de-Judaizing) activities provoked a full scale armed rebellion in
Judea—the
Maccabean Revolt. Efforts to deal with both the Parthians and the Jews as well as retain control of the provinces at the same time proved beyond the weakened empire's power. Antiochus orchestrated a military campaign, capturing
Artaxias I, King of Armenia, and reoccupying Armenia. His offensive ventured as far as Persepolis, but he was forced from the city by the populace. On his return home, Antiochus died in
Isfahan in 164 BC.
Civil war and further decay . Reverse with the Greek legend: ,
Basileōs Antiochou Theou Epiphanous Nikēphorou, "of Victorious God Manifest King Antiochus." , who ruled the country with the exception of the city of
Ptolemais After the death of
Antiochus IV Epiphanes, the Seleucid Empire became increasingly unstable. Frequent civil wars made central authority tenuous at best. Epiphanes' young son,
Antiochus V Eupator, was first overthrown by Seleucus IV's son,
Demetrius I Soter in 161 BC. Demetrius I attempted to restore Seleucid power in
Judea particularly, but was overthrown in 150 BC by
Alexander Balas—an impostor who (with Egyptian backing) claimed to be the son of Epiphanes. Alexander Balas reigned until 145 BC when he was overthrown by Demetrius I's son,
Demetrius II Nicator. Demetrius II proved unable to control the whole of the kingdom, however. While he ruled
Babylonia and eastern
Syria from
Damascus, the remnants of Balas' supporters—first supporting Balas' son
Antiochus VI, then the usurping general
Diodotus Tryphon—held out in
Antioch. Meanwhile, the decay of the Empire's territorial possessions continued apace. By 143 BC, the Jews in the form of the
Maccabees had fully established their independence.
Parthian expansion continued as well. In 139 BC, Demetrius II was defeated in battle by the Parthians and was captured. By this time, the entire Iranian Plateau had been lost to Parthian control. Demetrius Nicator's brother,
Antiochus VII Sidetes, took the throne after his brother's capture. He faced the enormous task of restoring a rapidly crumbling empire, one facing threats on multiple fronts. Hard-won control of
Coele-Syria was threatened by the Jewish Maccabee rebels. Once-vassal dynasties in Armenia, Cappadocia, and Pontus were threatening Syria and northern
Mesopotamia; the nomadic Parthians, brilliantly led by
Mithridates I of Parthia, had overrun upland Media (home of the famed
Nisean horse herd); and Roman intervention was an ever-present threat. Sidetes managed to bring the Maccabees to heel and frighten the Anatolian dynasts into a temporary submission; then, in 133, he turned east with the full might of the Royal Army (supported by a body of Jews under the
Hasmonean prince,
John Hyrcanus) to drive back the Parthians. mint. With the
Eagle of Zeus on the reverse.|left Sidetes' campaign initially met with spectacular success, recapturing Mesopotamia, Babylonia, and Media. In the winter of 130/129 BC, his army was scattered in winter quarters throughout Media and Persis when the Parthian king,
Phraates II, counter-attacked. Moving to intercept the Parthians with only the troops at his immediate disposal, he was ambushed and killed at the
Battle of Ecbatana in 129 BC. Antiochus Sidetes is sometimes called the last great Seleucid king. After the death of Antiochus VII Sidetes, all of the recovered eastern territories were recaptured by the Parthians. The Maccabees again rebelled, civil war soon tore the empire to pieces, and the Armenians began to encroach on Syria from the north.
Collapse (100–63 BC) By 100 BC, the once-formidable Seleucid Empire encompassed little more than
Antioch and some Syrian cities. Despite the clear collapse of their power, and the decline of their kingdom around them, nobles continued to play kingmakers on a regular basis, with occasional intervention from
Ptolemaic Egypt and other outside powers. The Seleucids existed solely because no other nation wished to absorb them—seeing as they constituted a useful buffer between their other neighbours. In the wars in Anatolia between
Mithridates VI of
Pontus and
Sulla of Rome, the Seleucids were largely left alone by both major combatants. Mithridates' ambitious son-in-law,
Tigranes the Great, king of
Armenia, however, saw opportunity for expansion in the constant civil strife to the south. In 83 BC, at the invitation of one of the factions in the interminable civil wars, he invaded Syria and soon established himself as ruler of Syria, putting the Seleucid Empire virtually at an end. Seleucid rule was not entirely over, however. Following the Roman general
Lucullus' defeat of both Mithridates and Tigranes in 69 BC, a rump Seleucid kingdom was restored under
Antiochus XIII. Even so, civil wars could not be prevented, as another Seleucid,
Philip II, contested rule with Antiochus. After the Roman conquest of Pontus, the Romans became increasingly alarmed at the constant source of instability in Syria under the Seleucids. Once Mithridates was defeated by
Pompey in 63 BC, Pompey set about the task of
remaking the Hellenistic East, by creating new client kingdoms and establishing provinces. While client nations like
Armenia and
Judea were allowed to continue with some degree of autonomy under local kings, Pompey saw the Seleucids as too troublesome to continue; doing away with both rival Seleucid princes, he made
Syria into a
Roman province. ==Culture==