The Nanda dynasty ruled in northern part of the Indian subcontinent during the 4th century BCE, and possibly during the 5th century BCE. In 326 BC, Alexander invaded India, after crossing the river Indus he advanced towards Taxila.
The Bhagvad Gita a later addition to the Mahabharata enshrines a philosophical doctrine and in it are described the three paths to salvation: karma, gyan and bhakti
The Puranas is important as they were the main influence in the development from early Vedic religion to Hinduism
The Shastras contained works of science and philosophy