Complex sentence: The Battle was between the Continental Army under general Nathanael Greene and the British Army under general Charles Cornwallis.The battle resulted in a British victory, but Greene's forces inflicted such heavy casualties on Cornwallis's forces.
Split into simpler sentences: The battle was between the Continental Army under general Nathanael Greene and the British Army under general Charles Cornwallis. Although a British victory, Greene's forces inflicted heavy casualties on Cornwallis's forces.