Complex sentence: On July 31, Major Andrew Williamson captured two white Loyalists, who led his 330 men into an ambush prepared by their fellow Tories and Seneca Indians on the Keowee River.
Split into simpler sentences: On July 31, Major Andrew Williamson captured two white Loyalists. They led his 330-men militia into an ambush by their fellow Tories and Seneca allies at the Keowee River.