Conquest of Seleucus' eastern territories

Growth :
Seleucus I Nicator, a Macedonian satrap of Alexander, reconquered most of Alexander's former empire and put beneath his own authority the jap territories so far as Bactria and the Indus (Appian, history of Rome, 

The Syrian Wars 55), except in 305 BCE he entered into conflict with Chandragupta:

 

continuously lying in wait for the neighboring countries, powerful in palms and persuasive in council, he acquired Mesopotamia, Armenia, 'Seleucid' Cappadocia, Persis, Parthia, Bactria, Arabia, Tapouria, Sogdia, Arachosia, Hyrcania, and different adjoining peoples that had been subdued via Alexander, as far as the river Indus, so that the boundaries of his empire had been the most large in Asia after that of Alexander. The whole vicinity from Phrygia to the Indus was subject to Seleucus. He crossed the Indus and waged battle with Sandrocottus [Maurya], king of the Indians, who dwelt on the banks of that movement, until they came to an figuring out with every different and contracted a wedding relationship. Some of these exploits have been performed earlier than the loss of life of Antigonus and a few later on.

The precise important points of engagement aren't known. As famous with the aid of students corresponding to R. C. Majumdar and D. D. Kosambi, Seleucus seems to have fared poorly, having ceded colossal territories west of the Indus to Chandragupta. Because of his defeat, Seleucus surrendered Arachosia (modern day Kandahar), Gedrosia (modern-day Balochistan), Paropamisadae (or Gandhara).
Mainstream scholarship asserts that Chandragupta obtained monstrous territory west of the Indus, including the Hindu Kush, brand new day Afghanistan, and the Balochistan province of Pakistan. Archaeologically, concrete signs of Maurya rule, such as the inscriptions of the Edicts of Ashoka, are often called some distance as Kandhahar in southern Afghanistan.

After having made a treaty with him [Sandrakotos] and put in order the Orient crisis, Seleucos went to war towards Antigonus.

It is mostly concept that Chandragupta married Seleucus's daughter to formalize an alliance. In a return gesture, Chandragupta despatched 500 battle-elephants a army asset which would play a decisive function at the fight of Ipsus in 302 BCE. Additionally to this treaty, Seleucus dispatched an envoy, Megasthenes, to Chandragupta, and later Deimakos to his son Bindusara, on the Maurya court at Pataliputra (state-of-the-art Patna in Bihar state). Later Ptolemy II Philadelphus, the ruler of Ptolemaic Egypt and latest of Ashoka the fine, can be recorded by using Pliny the Elder as having despatched an envoy named Dionysius to the Maurya court. 

Classical sources have additionally recorded that following their treaty, Chandragupta and Seleucus exchanged offers, similar to when Chandragupta sent more than a few aphrodisiacs to Seleucus:

And Theophrastus says that some contrivances are of wondrous efficacy in such issues [as to make people more amorous]. And Phylarchus confirms him, with the aid of reference to one of the grants which Sandrakottus, the king of the Indians, despatched to Seleucus; which were to act like charms in producing a exotic measure of affection, whilst some, on the opposite, have been to banish love.