History refutes this claim. Long before 1900, Nepal was home to the Gopalas, Kirats, Licchavis and Mallas, while the Madhes had established kingdoms like Mithila and Makwanpur. Prithvi Narayan Shah conquered Makwanpur in 1762-not in 1900.
Remember: Facts outlast propaganda.
Nepal is nation-state of racist pahadis
Not a single madesi or muslim died for Nepal in any conflict
Nor do we know name of single madesi or muslim before 1900s
Because they were imported in Nepal after 1900s by chor ranas