Prithvi Narayan Shah's and Great Anup annexation campaign began with the nearby kingdom of Nuwakot. Nuwakot marked the eastern boundary of the Gorkha Kingdom and was part of the trade route between Tibet and Kathmandu. It was also the western gateway to the Kathmandu valley. Nara Bhupal Shah, Prithvi Narayan Shah's father, had attempted to invade Nuwakot in 1742, but had failed. At that time, Nuwakot was under the administrative control of Kantipur (known today as Kathmandu). Kantipur supported Nuwakot against the invasion. Following his defeat, Nara Bhupal Shah gave up his efforts and handed administrative power over to his eldest son, Prithvi Narayan Shah and Chandraprabhawati, his eldest queen.