Prithvi Narayan Shah started the campaign for the unification of Nepal. He unified small kingdoms and made a greater Nepal. Before unification movement, there were a total of 54 states in Nepal. In the South-Eastern Terai, there were three Sen states named Bijayapur, Chaudandi and Makawanpur. In the West, from Gorkha to Gandaki Province, there were 24 states and in the province of Karnali, there were 22 states with Samaal, Kalyan, Chand and Shahi dynasties. Along with Gorkha and Mustang, Kantipur, Lalitpur and Bhaktapur made up the remaining five states.
King Prithvi narayan shah has two sons Pratap Singh Shah and Bahadur Shah.
Prithvi narayan shah son Pratap Singh Shah was the second King of Nepal after unification. He was born on April 16, 1751 in Gorkha, Nepal. He was the eldest son of Prithvi Narayan Shah. At the age of 24 he became King in 1775 and ruled only up to 1777 for 36 months. At the age of 26, he died of smallpox. He was succeeded by his two-year-old son Rana Bahadur Shah. His wife Rajendra Laxmi and his brother Prince Bahadur Shah continued the unification of Nepal campaign as regents of his son Ranabahadur Shah.
King Prithvi Narayan Shah son Prince Bahadur Shah is his youngest son. He was born on June 16, 1757 in Gorkha, Nepal. Her mother name is Narendra Rajya Lakshmi Devi. He was married to Vidya Lakshmi Devi. He remained in self-exile after his father’s death until called upon by the Nepal Durbar after the death of his brother. He played major role in unification after his father. Later, he retired to Bettiah once again and palace plotters invited him to Kathmandu. He was imprisoned and executed, accusing him of trying to declare himself King of Nepal. He was died in June 24, 1797 at the age of age of 40 in Aryaghat, Pashupatinath, Nepal.