Eutaw springs was a victory and a lost for British. Why is this statement factual

In early 1781, Major General Nathanael Greene commander of the Southern army in the Continental Army began a campaign to end British control over the South Carolina backcountry. His first major objective was the capture of the British controlled village of Ninety Six.[5] On May 22, 1781, Greene laid siege to the fortified village. After nearly a month Greene became aware that reinforcements under Lord Rawdon were approaching from Charleston.[6] Forces under Greene's command assaulted Ninety Six on June 18