Chandragupta Maurya as we know, he was the founder of Mauryan Dynasty. Chandragupta Maurya was a pivotal figure in the history of India. Prior to his consolidation of power, most of the Indian subcontinent was divided into mahajanapadas, while the Nanda Empire dominated the Indo-Gangetic Plain. Chandragupta succeeded in conquering and subjugating almost all of the Indian subcontinent by the end of his reign, except Tamil Nadu (Chera, Early Cholas and Early Pandyan Kingdom) and modern-day Odisha (Kalinga). His empire extended from Bengal in the east to Afghanistan and Balochistan in the west, to the Himalayas and Kashmir in the north, and to the Deccan Plateau in the south. It was the largest empire yet seen in Indian history.
In Greek and Latin accounts, Chandragupta is known as Sandrokottos and Androcottus. He became well known in the Hellenistic world for conquering Alexander the Great's easternmost satrapies, and for defeating the most powerful of Alexander's successors, Seleucus I Nicator, in battle. Chandragupta subsequently married Seleucus's daughter to formalize an alliance and established a policy of friendship with the Hellenistic kingdoms, which stimulated India's trade and contact with the western world. The Greek diplomat Megasthenes, who visited the Maurya capital Pataliputra, is an important source of Maurya history.
After unifying much of India, Chandragupta and his chief advisor Chanakya passed a series of major economic and political reforms. He established a strong central administration patterned after Chanakya’s text on politics, the Arthashastra. Chandragupta's India was characterised by an efficient and highly organised bureaucratic structure with a large civil service. Due to its unified structure, the empire developed a strong economy, with internal and external trade thriving and agriculture flourishing. In both art and architecture, the Maurya Empire made important contributions, deriving some of its inspiration from the culture of the Achaemenid Empire and the Hellenistic world. Chandragupta's reign was a time of great social and religious reform in India. Buddhism and Jainism became increasingly prominent. According to Jain accounts, Chandragupta abdicated his throne in favour of his son Bindusarasara, embraced Jainism, and followed Bhadrabahu and other monks to South India. He is said to have ended his life at Shravanabelagola (in present-day Karnataka) through Sallekhana.
Chandragupta came to future for saving Rajgir(a mysterious place in Bihar) and returning back to past in his time. Sukh was making of time machine and Sagar gives idea to bring him here in future from past. Because Saurya want sword.