Seleucus I (surnamed for later generations Nicator, Greek: Σέλευκος Νικάτωρ, i.e. Seleucus Victor) (ca. 358 BCE–281 BCE), was a Macedonian officer of Alexander the Great. In the wars of the Diadochi that took place after Alexander's death, Seleucus established the Seleucid dynasty and the Seleucid Empire.

Seleucus was the son of Antiochus, one of Philip's generals, and of Laodice. In 333 BC, as a young man of about twenty-three, he accompanied Alexander into Asia and won distinction in the Indian campaign of 326 BC. In 324 BCE Seleucus took as wife Apama, with whom he had four children: two daughters, Apama and Laodice, and two sons, Antiochus & Achaeus.

When the Macedonian empire was divided in 323 BC (the "Partition of Babylon"), Seleucus was given the office of chiliarch, which attached him closely to the regent Perdiccas. Subsequently, Seleucus had a hand in the murder of Perdiccas during the latter's unsuccessful invasion of Egypt in 321 BC.

At the second partition, at Triparadisus (321 BC), Seleucus was given the government of the Babylonian satrapy. In 316 BC, when Antigonus had made himself master of the eastern provinces, Seleucus felt himself threatened and fled to Egypt. In the war which followed between Antigonus and the other Macedonian chiefs, Seleucus actively cooperated with Ptolemy and commanded Egyptian squadrons in the Aegean Sea.

The victory won by Ptolemy at the battle of Gaza in 312 BC opened the way for Seleucus to return to the east. His return to Babylon was afterwards officially regarded as the beginning of the Seleucid Empire and that year as the first of the Seleucid era. Master of Babylonia, Seleucus at once proceeded to wrest the neighbouring provinces of Persia, Susiana and Media from the nominees of Antigonus. A raid into Babylonia conducted in 311 BC by Demetrius, son of Antigonus, did not seriously check Seleucus' progress. Over the course of nine years (311-302 BC), while Antigonus was occupied in the west, Seleucus brought the whole eastern part of Alexander's empire as far as the Jaxartes and Indus Rivers under his authority.

In 305 BC, after the extinction of the old royal line of Macedonia, Seleucus, like the other four principal Macedonian chiefs, assumed the title and style of basileus (king). He established Seleucia on the Tigris as his capital.

In the year 305 BC Seleucus I Nicator went to India and apparently occupied territory as far as the Indus, and eventually waged war with the Maurya Emperor Chandragupta Maurya: :"Always lying in wait for the neighboring nations, strong in arms and persuasive in council, he [Seleucus] acquired Mesopotamia, Armenia, 'Seleucid' Cappadocia, Persis, Parthia, Bactria, Arabia, Tapouria, Sogdia, Arachosia, Hyrcania, and other adjacent peoples that had been subdued by Alexander, as far as the river Indus, so that the boundaries of his empire were the most extensive in Asia after that of Alexander. The whole region from Phrygia to the Indus was subject to Seleucus. He crossed the Indus and waged war with Sandrocottus, king of the Indians, who dwelt on the banks of that stream, until they came to an understanding with each other and contracted a marriage relationship." Appian, History of Rome, The Syrian Wars 55

As most historians note, Seleucus appears to have fared poorly as he did not achieve his aims. The two leaders ultimately reached an agreement, and through a treaty sealed in 305 BC, Seleucus ceded a considerable amount of territory to Chandragupta in exchange for 500 war elephants, which were to play a key role in the battles that were to come. According to Strabo, these were territories bordering the Indus:

:"The Indians occupy [in part] some of the countries situated along the Indus, which formerly belonged to the Persians: Alexander deprived the Ariani of them, and established there settlements of his own. But Seleucus Nicator gave them to Sandrocottus in consequence of a marriage contract, and received in return five hundred elephants." Strabo 15.2.1(9)

Modern scholarship often considers that Seleucus actually gave more territory, in what is now southern Afghanistan, and parts of Persia west of the Indus. This would tend to be corraborated archaeologically, as concrete indications of Mauryan influence, such as the inscriptions of the Edicts of Ashoka, are known as far as Kandhahar, in today's southern Afghanistan.

Some authors claim this is an exaggeration, which comes from a statement made by Pliny the Elder, referring not specifically to the lands received by Chandragupta, but rather to the various opinions of geographers regarding the definition of the word "India" : :"The greater part of the geographers, in fact, do not look upon India as bounded by the river Indus, but add to it the four Satrapies of the Gedrosi (Gedrosia), the Arachotæ (Arachosia), the Arii (Aria), and the Paropauisidæ (Paropamisadae), the river Cophes (Kabul river) thus forming the extreme boundary of India. All these territories, however, according to other writers, are reckoned as belonging to the country of the Arii." Pliny, Natural History VI, 23

Also the passage of Arrian explaining that Megasthenes lived in Arachosia with the satrap Sibyrtius, from where he visited India to visit Chandragupta, goes against the notion that Arachosia was under Maurya rule: :"Megasthenes lived with Sibyrtius, satrap of Arachosia, and often speaks of his visiting Sandracottus, the king of the Indians." Arrian, Anabasis Alexandri v,6

Nevertheless, it is usually considered today that Arachosia and the other three regions did become dominions of the Mauryan Empire.

To cement the treaty, there was either some sort of marriage alliance (Epigamia) involving Seleucus' daughter or the diplomatic recognition of intermarriage between Indians and Greeks.

In addition to this matrimonial recognition or alliance, Seleucus dispatched an ambassador, Megasthenes, to the Mauryan court at Pataliputra (Modern Patna in Bihar state). The two rulers seem to have been on very good terms, as Classical sources have recorded that following their treaty, Chandragupta sent various presents such as aphrodisiacs to Seleucus.

Seleucus obtained knowledge of most of northern India, as explained by Pliny the Elder through his numerous embassies to the Mauryan Empire: :"The other parts of the country [beyond the Hydaspes, the farthest extent of Alexander's conquests] were discovered & surveyed by Seleucus Nicator: namely :- from thence (the Hydaspes) to the Hesudrus 168 miles :- to the river Ioames as much: and some copies add 5 miles more therto :- from thence to Ganges 112 miles :- to Rhodapha 119, and some say, that between them two it is no less than 325 miles. :- From it to Calinipaxa, a great town 167 miles & a half, others say 265. :- And to the confluent of the rivers Iomanes and Ganges, where both meet together, 225 miles, and many put thereto 13 miles more :- from thence to the town Palibotta 425 miles :- and so to the mouth of Ganges where he falleth into the sea 638 miles." :Pliny the Elder, Natural history, Chap 21

Seleucus apparently minted coins during his stay in India, as several coins in his name are in the Indian standard and have been excavated in India. These coins describe him as "Basileus" ("King"), which implies a date later than 306 BCE. Some of them also mention Seleucus in association with his son Antiochus as king, which would also imply a date as late as 293 BCE. No Seleucid coins were struck in India thereafter and confirm the reversal of territory west of the Indus to Chandragupta.

In 301 BC he joined Lysimachus in Asia Minor, and at Ipsus Antigonus fell before their combined power. A new partition of the empire followed, by which Seleucus added to his kingdom Syria, and perhaps some regions of Asia Minor.

In 300 BCE, after the death of Apama, Seleucus married Stratonice, daughter of Demetrius Poliorcetes. Seleucus had a daughter by Stratonice, who was called Phila. In in 294 BC Stratonice married her step-son Antiochus. Seleucus reportedly instigated the marriage after discovering that his son was in danger of dying of lovesickness.

The possession of Syria gave him an opening to the Mediterranean, and he immediately founded the new city of Antioch on the Orontes as his chief seat of government. Seleucia on the Tigris continued to be the capital for the eastern satrapies. About 293 BC, he installed his son Antiochus there as viceroy, the vast extent of the empire seeming to require a double government.

It is said of Seleucus that "few princes have ever lived with so great a passion for the building of cities. He is reputed to have built in all nine Seleucias, sixteen Antiochs, and six Laodiceas".



The capture of Demetrius in 285 BC added to Seleucus's prestige. The unpopularity of Lysimachus after the murder of Agathocles gave Seleucus an opportunity for removing his last rival. His intervention in the west was solicited by Ptolemy Keraunos, who, on the accession to the Egyptian throne of his brother Ptolemy II (285 BC), had at first taken refuge with Lysimachus and then with Seleucus. War between Seleucus and Lysimachus broke out, and at the decisive battle of Corupedium in Lydia, Lysimachus fell (281 BC). Seleucus now held the whole of Alexander's conquests excepting Egypt in his hands, and moved to take possession of Macedonia and Thrace. He intended to leave Asia to Antiochus and content himself for the remainder of his days with the Macedonian kingdom in its old limits. He had, however, hardly crossed into the Chersonese when he was assassinated by Ptolemy Keraunos near Lysimachia (281 BC).

*A genealogical tree of Seleucus *Seleucus I Nicator entry in historical sourcebook by Mahlon H. Smith

* Grainger, John D. "An Empire Builder—Seleukos Nikator", History Today, Vol. 43, No. 5. (1993), pp. 25–30. * Grainger, John D. Seleukos Nikator: Constructing a Hellenistic Kingdom. New York: Routledge, 1990 (hardcover, ISBN 0-415-04701-3).