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330 BCE
320 BCE
310 BCE
300 BCE
290 BCE
280 BCE
270 BCE
260 BCE
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240 BCE
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100 BCE
329 BCE - 327 BCE: Alexander conquers Bactria and Sogdiana.
293 BCE: Antiochos is appointed vice-king of the Upper-Satrapies by his father Seleucus I Nicator.
280 BCE: Incursion of northern nomads (Sakas) on Seleucid territories.
209 BCE: Sogdians make themselves independant, using the fact that Euthydemos I of Bactria was besieged in Bactra by Antiochos III.
200 BCE: Sakas conquer the Sogdiana part of the Iaxartes.
200 BCE - 100 BCE: Scythians tribes migrate into Bactria, Sogdiana and Arachosia.