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The Limbuwan-Gorkha War was a series of battles fought between the king of Gorkha and the rulers of various principalities of Limbuwan from 1771 to 1774 AD. After the conquest of Majh Kirat (Khambuwan kingdoms) and Wallo Kirat by the Gorkhas, they invaded Limbuwan on two fronts. One front was in Chainpur (present-day Sankhuwasabha District) and the second front was in Bijaypur (present-day Dharan, Sunsari District). Bijaypur was the capital of the Morang Kingdom of Limbuwan Yakthung Laje.
The war came to an end in 1774 AD with the ceasefire treaty, "treaty of Salt and Water," between Yakthung Laje Limbuwan king and Gorkha king. It recognized co-existence of government system and equal rights between Gorkha King and Yakthung Laje Limbuwan Kings. The war was ended with the signing of the Limbu-Gorkha treaty which ceded the much of this territory east of Arun river to the Gorkha kingdom.
- A Paper work entitled "Yakthung Laje Limbuwan as a Stateless Nation: An Independent Movement" presented by Hang TUTU Nir Kumar Sambahangphe Limbu of Yakthung Laje Limbuwan National Council (YLNC) on 22 December 2020 Tejpur Assam, India.
- Saul Mullard,D.Phil(2009) from the Department of South and Inner Asia, University of Oxford, "Opening of the Hidden Land, State Formation and the Construction of Sikkimese History" Rachana Books & Publications, Developement Area, Gantok, Sikkim 737101,1979