Ajatashatru (ruled 491-461 BCE) was a king of the Magadha empire that ruled north India.
There is not a great deal known about Ajatashatru, who lost in the shrouds of time. What is known that he became a King of Magadha and the adjoining areas by murdering his father, Bimbisara. And that he was a contemporary of Lord Buddha, and was a patron of the then-new religion of Buddhism and let the Sangha function in his Kingdom.
Some details of him are given in the Vedas as well as the earliest Buddhist scriptures.
Ajatasatru ascended to the throne and expanded his territory by conquests.
Ajatasatru patiently schemed for 16 years to break the unity and strength of Vajjis.
Ajatasatru resorted to foul methods, sowing seeds of discord among different classes of the confederacy through one of his ministers who settled amongst the Vajjis and became adept in destroying the social unity of the people.