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 January 16, 1761. Wandiwash is the Anglicised pronunciation of Vandavasi.