Answer:
Battle of Kathmandu Valley, Kathmandu, Lalitpur and Bhaktapur.
Explanation:
Prithvi Narayan Shah is the Unifier of Nepal because he fought wars to extend his empire. Battle of Kathmandu Valley, Kathmandu, Lalitpur and Bhaktapur are the four major wars that fought by king Prithvi Narayan Shah in order to unified different states into greater Nepal. Places such as Kathmandu Valley, Kathmandu, Lalitpur and Bhaktapur etc for which the king Prithvi Narayan Shah fought wars so the war then named on the place where it occur.