Complex sentence: Canso, Nova Scotia, a recently established fishing settlement disputed by all three parties but fortified by Nova Scotia and primarily occupied by Massachusetts fishermen, was attacked by Mi'kmaq and French forces in 1720, further raising tensions.
Split into simpler sentences: Canso, Nova Scotia was established as a fishing settlement disputed by all three parties but fortified by Nova Scotia and primarily occupied by Massachusetts fishermen. It was attacked by Mi'kmaq and French forces in 1720, further raising tensions.