Answer:
If you are referring to the PN Shah campaign for the Unification of Nepal. This statement is false.
Step-by-step explanation:
PN Shah's campaign for the unification of Nepal did not have diplomacy as an important and effective element. This is because this was one of the most violent and aggressive campaigns in all of history, where unification was promoted through the military conquest of important regions for the kingdom of Nepal. In this case, PN Shah scheduled the invasion and redemption of the Kathmandu Valley, Kathmandu, Lalitpur and Bhaktapur regions. These invasions had no diplomatic element, but they were made on the basis of military power.