None of the ancient texts mention when Chandragupta was born. Plutarch claims that he was a young man when he met Alexander during the latter's invasion of India (c. 326-325 BCE). Assuming the Plutarch account is true, Raychaudhuri proposed in 1923 that Chandragupta may have been born after 350 BCE. According to other Greco-Roman texts, Chandragupta attacked the Greek-Indian governors after Alexander's death (c. 323 BCE) with Seleucus I Nicator entering into a treaty with Chandragupta years later. Seleucus Nicator, under this treaty, gave up Arachosia (Kandahar), Gedrosia (Makran), and Paropanisadai (Paropamisadae, Kabul) to Chandragupta, in exchange for 500 war elephants.