Complex sentence: During the Revolutionary War, they and the Catawba removed their families to the same areas near Danville, Virginia where they had lived earlier while their warriors served the Patriot cause under General Thomas Sumter.
Split into simpler sentences: During the Revolutionary War, they and the Catawba removed their families to the same areas near Danville, Virginia where they had lived earlier. Their warriors served the Patriot cause under General Thomas Sumter.