High Quality Content by WIKIPEDIA articles! The Battle of Wandiwash was a decisive battle in India during the Seven Years` War. The Count de Lally`s army, burdened by a lack of naval support and funds, attempted to regain the fort at Vandavasi near Pondicherry. He was attacked by Sir Eyre Coote`s forces and decisively defeated. The French general Marquis de Bussy-Castelnau and the French were then restricted to Pondicherry, where they surrendered on 16 January 1761. Wandiwash is the Anglicised pronunciation of Vandavasi.