Detached from the task group, "Haines" next took an active part in the vast armada that invaded southern France. Departing Naples on 13 August, she escorted troop transports to the assault area, and later acted as a screening ship for the gunfire support group offshore. She also performed mine clearing in the port of Marseilles. "Haines" continued her escort duties into September as the Allied advance gained momentum, acting as escort to an LST group ferrying supplies from Corsica to France.