Shishunaga dynasty was the successor of the Haryanka dynasty. The founder of the dynasty was Shishunaga (founded it around 413 BCE), who was previously the minister at the last ruler Nāgadāsaka of Haryanka dynasty. He temporarily moved the capital to Vaishali. His greatest achievement was the destruction of the power of Avanti with its capital at Ujjain. This put to an end the 100-years old rivalry between Magadha and Avanti. From now onwards Avanti became the part of the Magadha until the end of Mauryan rule.
Ajatashatru was the son of king Bimbisara and the second king of the Haryanka dynasty. He killed his father and seized the throne for himself. He succeeded his father around 492 BCE and ruled for approximately 32 years. His region saw high watermark of the Haryanka Dynasty. He took an aggressive policy for expansion and made Magadha most powerful state of that time.
King Bhatiya founded the Haryanka Dynasty in the middle of the 6th century BCE. Although actual establishment of kingdom was done under the rule of Bimbisara so he was considered as actual founder of the dynasty. Haryanka dynasty was the second ruling dynasty of Magadha after Brihadratha Dynasty.
Magadha had played very important role in Indian History, For many centuries it was the center of many large kingdoms, empires and culture heritage. It is the birthplace of Jainism and Buddhism. Magadha was located in north-eastern India, which is now west-central Bihar state.
Magadha’s root were found from the Atharvaveda, but at that time it was not the place liked by Aryans.
Magadha was mentioned in Ramayana as a place inhabited by opulent(Samruddhajanasevith – rich peoples). It was very fertile place richly filled with corns.