High Quality Content by WIKIPEDIA articles! The Greco-Bactrian Kingdom was the easternmost part of the Hellenistic world, covering Bactria and Sogdiana in Central Asia from 250 to 125 BCE. The expansion of the Greco-Bactrians into northern India from 180 BCE established the Indo-Greek Kingdom, which was to last until around 10 CE. The Greco-Bactrian Kingdom was founded when Diodotus I, the satrap of Bactria seceded from the Seleucid Empire around 250 BC. The preserved ancient sources are somewhat contradictory and the exact date of Bactrian independence has not been settled. Somewhat simplified, there is a high chronology and a low chronology for Diodotos secession. The high chronology has the advantage of explaining why the Seleucid king Antiochus II issued very few coins in Bactria, as Diodotos would have become independent there early in Antiochus' reign. On the other hand, the low chronology, from the mid-240s BC, has the advantage of connecting the secession of Diodotus I with the Third Syrian War, a catastrophic conflict for the Seleucid Empire.