Answer
Treaty: The Seleucid–Mauryan War concluded with a treaty between Seleucus I Nicator and Chandragupta Maurya. Seleucus ceded vast territories in the east to Chandragupta, including the satrapies of Paropamisadae, Aria, and Gedrosia. In exchange, Chandragupta provided 500 war elephants to Seleucus, which played a crucial role in his victory at the Battle of Ipsus.