About India

Amongst the sixteen Mahajanapadas, the kingdom of Magadha rose to prominence under a number of dynasties. According to tradition, the Haryanka dynasty founded the Magadha Empire in 684 BC whose capital was Rajagriha, later Pataliputra, near the present day Patna. This dynasty was succeeded by the Shishunaga dynasty which, in turn, was overthrown by the Nanda dynasty in 424 BCE. The Nandas were followed by the Maurya dynasty.

Maurya dynasty
Main article: Maurya Dynasty
See also: Chandragupta Maurya and Ashoka the Great

Map depicting the largest extent of the Mauryan Empire in dark blue, and allied or friendly areas in light blue
In 321 BCE, exiled general Chandragupta Maurya, under direct patronage of the genius of Chanakya, founded the Maurya dynasty after overthrowing the reigning king Dhana Nanda. Most of the subcontinent was united under a single government for the first time under the Maurya rule. Mauryan empire under Chandragupta would not only conquer most of the Indian subcontinent, but also push its boundaries into Persia and Central Asia, conquering the Gandhara region. Chandragupta Maurya is credited for the spread of Jainism in southern Indian region.
Chandragupta was succeeded by his son Bindusara, who expanded the kingdom over most of present day India, barring Kalinga, and the extreme south and east, which may have held tributary status. Bindusara's kingdom was inherited by his son Ashoka the Great who initially sought to expand his kingdom. In the aftermath of the carnage caused in the invasion of Kalinga, he renounced bloodshed and pursued a policy of non-violence or ahimsa after converting to Buddhism. The Edicts of Ashoka are the oldest preserved historical documents of India, and from Ashoka's time, approximate dating of dynasties becomes possible. The Mauryan dynasty under Ashoka was responsible for the proliferation of Buddhist ideals across the whole of East Asia and South-East Asia, fundamentally altering the history and development of Asia as a whole. Ashoka's grandson Samprati adopted Jainism and helped spread Jainism.

Post Mauryan Magadha dynasties
The Sunga Dynasty was established in 185 BCE, about fifty years after Ashoka's death, when the king Brihadratha, the last of the Mauryan rulers, was murdered by the then commander-in-chief of the Mauryan armed forces, Pusyamitra Sunga. The Kanva dynasty replaced the Sunga dynasty, and ruled in the eastern part of India from 71 BCE to 26 BCE. In 30 BCE, the southern power swept away both the Kanvas and Sungas. Following the collapse of the Kanva dynasty, the Satavahana dynasty of the Andhra kingdom replaced the Magadha kingdom as the most powerful Indian state.