To determine which event occurred last, we can look at the timeline of these events in the American Revolutionary War:
- Cornwallis’s capture of Charleston - May 1780
- The battle at Guilford Courthouse - March 1781
- The Battle of Cowpens - January 1781
- The surrender of Cornwallis at Yorktown - October 1781
The last event in this timeline is the surrender of Cornwallis at Yorktown, which occurred in October 1781.