Complex sentence: One of the province's and Canada's most famous regiments was "The King's First American Regiment" founded in 1776 in New England was composed mostly of Highlanders, many of whom fought with their traditional kilts to the sound of the pipes.
Split into simpler sentences: One of the province's and Canada's most famous regiments was "The King's First American Regiment" founded in 1776 in New England. It was composed mostly of Highlanders, many of whom fought with their traditional kilts to the sound of the pipes.