Nawab of Arcot, a close ally of the British, set out to regain it by sending troops, led by his son Mahfuz Khan, to Madras.

Khan seized San Thomé and formed a battle line on the north bank of the Adyar River on 22 October to prevent the French from moving up reinforcements from Pondicherry.

Mahfuz Khan's troops fled and the Battle of the Adyar River, which began on the morning of 24 October 1746, ended that evening with the French retaining control over Fort St.

[4] The battle of Adyar was one of the first that illustrated the overwhelming superiority of 18th century European military firepower in the Indian sub-continent, while also demonstrating that even a sizeable cavalry force was no match for a well-equipped, disciplined infantry.

[5] After the battle cemented the French position in Madras, they and the English continued to spar over French-controlled Pondicherry and British-held Fort St. David without either side gaining territory.