Complex sentence: Nepal Sambat was replaced as the national calendar after the conquest of Nepal by the Gorkha Kingdom in 1769 which resulted in the end of the Malla dynasty and the advent of the Shah dynasty.
Split into simpler sentences: Nepal Sambat was replaced as the national calendar after the conquest of Nepal by the Gorkha Kingdom in 1769. The victory of the Gorkha Kingdom resulted in the end of the Malla dynasty and the advent of the Shah dynasty.