Settlements > Bactra
Alexander conquered Sogdiana. In the south, beyond the Oxus, he met strong resistance. After two years of war and a strong insurgency campaign, Alexander managed to establish little control over Bactria. After Alexander's death, Diodorus Siculus tells us that Philip received dominion over Bactria, but Justin names Amyntas to that role. At the Treaty of Triparadisus, both Diodorus Siculus and Arrian agree that the satrap Stasanor gained control over Bactria. Eventually, Alexander's empire was divided up among the generals in Alexander's army. Bactria became a part of the Seleucid Empire, named after its founder, Seleucus I.
1911 Encyclopædia Britannica, Volume 3