From the time of Bimbisara to the Kalinga war the history of India was the story of the expansion of Magadha from tiny state in South Bihar to a gigantic Empire, extending from the foot of the Hindukush to the borders of the Tamil Country. After the Kalinga war ensued a period of stagnation at the end of which the process is reversed. Under the rule of Ashoka it reached at its peak. But after the death of Ashoka, the empire gradually dwindled down in extent till it sank to the position from which Bimbisara and his successors had raised it. Historians gave may reasons for the fall of the Maurya Empire.