From February to June 1783 "Héros" cruised between the Coromandel and Trincomalee coasts, with Suffren making Trincomalee his main base. She was present on 10 March when the squadron was reinforced by a large force under Bussy (consisting of the 74-gun "Fendant" and "Argonaute", the 66-gun "Hardi", and transports carrying 2,500 men). Suffren ordered this force to attack the British forces heading for Madras. "Héros" escorted the force before returning to Trincomalee and on 20 June she and the squadron fought the battle of Cuddalore. This was the final engagement between Hughes' and Suffren's squadrons – Suffren decided to give battle despite being outnumbered 18 to 15 in an attempt to lift the encirclement of Bussy's forces at Cuddalore. "Héros" took part in the battle, but orders received from the French king forced Suffren to lead the squadron from a frigate instead to avoid being wounded or captured – this directive had come into force after de Grasse's capture from the "Ville de Paris" at the battle of the Saintes on 12 April the previous year. Hughes's squadron was forced to flee, saving Bussy's force as Suffren had hoped. However, Suffren was unable to capitalize upon the victory as nine days later he received a dispatch reporting the signing of a preliminary peace agreement in Europe five months earlier that would become the Treaty of Paris.