He tried to extend his kingdom by capturing Nuwakot, but he failed. After his death, his eldest son, Prithvi Narayan Shah, completed the annexation of Nuwakot and even the Kathmandu Valley, in his conquest of a unified Nepal.
The king's ambition to extend his rule led to a failed attempt at capturing Nuwakot.  After his death, his eldest son, Prithvi Narayan Shah, completed the annexation of Nuwakot and the Kathmandu Valley as part of his efforts to unify Nepal.