On 3 April 1743,[7] 20-year-old, Prithvi Narayan Shah ascended the throne of the Gorkha after the death of his father Nara Bhupal Shah.[6] Like his father, he attacked Nuwakot in 1742 and he suffered another defeat so Shah realised he needed more military technology and manpower to capture Nuwakot.[8] Shah acquired weapons from Banaras, created alliances with other kingdoms, increased the manpower, and started the assault on 26 September 1744.[9] This time Gorkhalis won the war which resulted in Nuwakot ceding from Malla Kings and subsequently started the unification of Nepal campaign.[10] As Gorkhas were continuing their expansion, Jaya Prakash Malla, King of Kantipur requested assistance from the East India Company because he did not see other ways to stop them.[11]Thomas Rumbold, head of the company in Patna advised Shah to remove the blockade of Kantipur and abstain from attacking Malla or else it could result in a war.[11] Rumbold not receiving any positive response from Prithvi Narayan Shah led to the Battle of Sindhuli.[11]
Trade route
During the reign of Gorkha's Ram Shah and Kantipur's Pratap Malla, both gained control of important areas in Tibet's border crossing areas where most of the trans-Himalayan trade occurred.[12] Shah invaded Tibet around c. 1625-1630, the first attack was unsuccessful however the second strike proved to be successful which gained control of Kerong and went far as Kukurghat, north of Kerong.[12] War ended with Gorkha signing a treaty with Tibet which gave Shah access to the main trade route.[12] This created a problem for Kantipur as their traders used the same route, Malla did not fight for Kerong but he gained access to Kuti, second important route.[12] He also signed a treaty, which created a monopoly for their traders as the trade between India and Tibet was extremely profitable, and the king also profited from the coins minted for their government.[12]East India Company carried their trades to Tibet and China from Kathmandu, and they came in conflict with the Gorkhas because Prithvi Narayan Shah's blockade of Kantipur which affected them.[13][14]
Terrain
Sindhuli Gadhi is located 4,648 feet above the sea level and it is about 150-kilometre away from Kathmandu.[15]
Battle
This section is missing information about battle. Please expand the section to include this information. Further details may exist on the talk page.(January 2021)