Complex sentence: A single shot from a cannon at Fishguard Fort forced the vessel to turn around and instead, under the cover of darkness, "La Legion Noire" landed at the secluded bay of Carregwastad, three miles west of Fishguard.
Split into simpler sentences: A single shot from a cannon at Fishguard Fort forced the vessel to turn around. Instead, under the cover of darkness, "La Legion Noire" landed at the secluded bay of Carregwastad, three miles west of Fishguard.