Complex sentence: This led to his first circumnavigation: in 1679 he accompanied a raid across the Isthmus of Darién in Panama and captured Spanish ships on the Pacific coast of that isthmus; the pirates then raided Spanish settlements in Peru before returning to the Caribbean.
Split into simpler sentences: This led to his first circumnavigation during which he accompanied a raid across the Isthmus of Darién in Panama and captured Spanish ships on the Pacific coast of that isthmus. The pirates then raided Spanish settlements in Peru before returning to the Caribbean.