article: Seleucid–Mauryan War
links: Gandhara Macedonians Strabo Arachosia Achaemenid Empire Herat Province Historian Herat Indus River Seleucid Empire Seleucus I Nicator Military history Macedonian Empire Alexander the Great Chandragupta Maurya India Gandāra Gedrosia (satrapy) Hindu Kush War elephant Maurya Empire Afghanistan Balochistan Indus Valley Plain Chanakya