Complex sentence: In late June, war parties from the Lower Towns began attacking the frontier of South Carolina, and after the beginning July, the Out, Middle, and Valley Towns sent out war parties raiding the frontiers settlements of North Carolina east of the Blue Ridge.
Split into simpler sentences: In late June, war parties from the Lower Towns began attacking the frontier of South Carolina. After the beginning July, the Out, Middle, and Valley Towns sent out war parties raiding the frontiers settlements of North Carolina east of the Blue Ridge.