Greek historians liken him to Alexander the Great: Who is Antiochus III the Great?

(242-187 BC) Seleucid king. He was born in Babylon. He died in Susa (in today's Iran). He is the son of Seleucus II. He became king after his brother Seleucus III was assassinated in 223 BC. In 222 BC, Molon, Satrap of Media, rebelled and declared independence. He suppressed Molon's revolt in 220 BC. During the Fourth Syrian War between 219-216 BC, he took control of Selevkia in Pieria (Suveydiye), Tire, and Ptoemais, one of the important ports of the Mediterranean. He captured Lebanon, Palestine, and the Syrian coast.

Antiochus III the Great (241 – 3 July 187 BC) was a Greek Hellenistic king and the 6th ruler of the Seleucid Empire, reigning from 222 to 187 BC.

But in 217 BC, the Egyptian ruler Ptolemy IV was defeated by Filopatos and with the treaty, he gave back the regions that Seleucia had taken except Pieria. After the Syrian war, he suppressed the uprising of the Anatolian Satrap Achaeus. He expanded the borders of his country from Parthia to India in the Eastern Campaign that lasted between BC 212-203. He established a structure based on legal states in the regions he conquered in the east. The Greeks, who likened Antiochus to Alexander, began to call him "the Great".

The Seleucid Empire was a Greek state in West Asia that existed during the Hellenistic period from 312 BC to 63 BC.

In 198 BC, he organized an expedition to Egypt and invaded Southern Syria. With the "195 Treaty", he added this region to his own territory. After this, he organized an expedition to Europe to re-establish the empire of Alexander the Great but returned to Antioch after rumors of Egypt preparing a conspiracy.

He invited Hannibal, who was defeated by Rome, to his palace and made him his advisor. In 192 BC he declared war on Greece. He was defeated in Southern Thessaly in 191 and in Manisa in 190 BC. Thus, the Romans ended the Seleucid domination in Anatolia. With the Treaty of Apameia in 189 BC, Antiochus recognized Roman sovereignty in Anatolia and gave up his navy. Its sovereignty was limited to Syria, Mesopotamia, and Western Iran. He left his son Seleucus as a regent in Syria and withdrew to Luristan. He was killed in a temple near Susa in 187 BC.