Ajatashatru followed policies of conquest and expansion just like present day China. He defeated his neighbours including the king of Kosala.
Ajatashatru is the inventor of two weapons used in war, called Rathamusala (a scythe chariot) and a Mahashilakantaka (a weapon for hurling big stones on the enemy).
Ajatashatru was born to King Bimbisara and queen Chellana, who was the daughter of Chetaka the king of Vaishali
Ajatashatru, was also known as Kunika. The ancient inscription in Government Museum Mathura, refers to him as ‘Vaidehi putra Ajatashatru Kunika.”