Ajatsatru was the son of Bimbisar,the king of Haranyaka dynasty of Magadh. He did made his way to throne by seizing it by his father..and its result was indeed bad. When Bimbisar died in prison,Mahakoshala,Ajatsatru's mother and Presanjit's sister killed herself. This made Presanjit very furious. He attacked Magadh and defeated Ajatsatru...but it was not for longer. He soon forgave his nephew and married his daughter to Ajatsatru.

Hope that this will help you with some general information...

Who is Ajatashatru?
Ajatashatru was an ancient Indian king who ruled Magadha during the 5th century BCE. He was the son of King Bimbisara and Queen Chellana. Ajatashatru is known for his military conquests, political acumen, and his role in the expansion of the Magadha Empire.

Early Life and Rise to Power
Ajatashatru ascended to the throne of Magadha after imprisoning and eventually killing his father, King Bimbisara. He is said to have been a ruthless and ambitious ruler who was willing to go to great lengths to expand his kingdom.

Military Conquests and Achievements
During his reign, Ajatashatru waged several successful military campaigns to expand the borders of the Magadha Empire. He is credited with conquering the kingdom of Kosala and annexing it to his own territory. He also defeated the powerful kingdom of Vaishali and brought it under his control.

Political Acumen and Governance
Ajatashatru was known for his political astuteness and his ability to maintain stability within his kingdom. He established a strong administrative system and implemented various policies to promote economic growth and social welfare.

Legacy
Ajatashatru's reign marked a significant period in the history of ancient India, as he played a crucial role in the expansion of the Magadha Empire and the consolidation of power in the region. His military conquests and political achievements laid the foundation for the rise of the Mauryan Empire under his successors.
Overall, Ajatashatru was a powerful and influential ruler whose legacy continues to be remembered in Indian history for his contributions to the growth and prosperity of the Magadha Empire.