Q. Who annexed the territories after the Magadha–Vajji war?
Answer:
Ajātasattu
Notes: Ajātasattu, the king of Magadha (Haryanka dynasty), defeated the Vajjika League led by the Licchavis and annexed their territories after the Magadha–Vajji war (484–468 BCE), consolidating Magadha's power in North India.