Complex sentence: His father, Shivram Singh, was the first military leader of Gorkha, who laid down his life in the campaign to unify Nepal in 1746 in Chhaling, (Naldum) near Bhaktapur.
Split into simpler sentences: His father, Shivram Singh, was the first military leader of Gorkha. He laid down his life in a campaign to unify Nepal in 1746 in Chhaling, (Naldum) near Bhaktapur.