Demetrius I, surnamed Soter, reigned as king (basileus) of the Hellenistic Seleucid Empire from November 162 to June 150 BC. Demetrius grew up in Rome as a hostage, but returned to Greek Syria and overthrew his young cousin Antiochus V Eupator and regent Lysias. Demetrius took control during a turbulent time of the Empire, and spent much of his time fighting off revolts and challenges to his power from threats such as Timarchus and Alexander Balas.
Coin 162-150 BC.
The Seleucid Empire was a Greek power in West Asia during the Hellenistic period. It was founded in 312 BC by the Macedonian general Seleucus I Nicator, following the division of the Macedonian Empire founded by Alexander the Great, and ruled by the Seleucid dynasty until its annexation by the Roman Republic under Pompey in 63 BC.
Seleucid Empire
"Chandra Gupta Maurya entertains his bride from Babylon": a conjectural interpretation of the "marriage agreement" between the Seleucids and Chandragupta Maurya, related by Appian
Coin of Seleucus I Nicator
In Bactria, the satrap Diodotus asserted independence to form the Greco-Bactrian kingdom c. 245 BC.