Treaty of Aix-la-Chapelle and First Carnatic War

The First Carnatic War (1746–1748) was the initial military conflict between the English and French East India Companies for dominance in South India. This regional war was an extension of the War of the Austrian Succession (1740–1748) in Europe, where Britain and France fought on opposing sides over the Habsburg throne. The Carnatic region covered the coastal plain between the Eastern Ghats and the Bay of Bengal, extending from the Krishna River down to Kanyakumari. It was nominally under the Nizam of Hyderabad, but Nawab Anwar-ud-din Khan governed it independently from Arcot. The proximity of the primary English settlement at Fort St. George in Madras to the French base at Pondicherry made the region a natural flashpoint.

Outbreak of Hostilities and the Siege of Madras

Hostilities began in 1745 when a British naval squadron under Commodore Barnet captured French merchant ships in the Indian Ocean. Joseph François Dupleix, the Governor-General of French India, requested naval assistance from Bertrand-François Mahé de La Bourdonnais, the Governor of Mauritius. La Bourdonnais arrived with a French fleet, defeated the British naval forces, and blockaded Madras. In September 1746, French troops laid siege to Fort St. George and captured it in three days. Robert Clive, then a young clerk for the English Company, was taken as a prisoner of war before escaping to Fort St. David at Cuddalore.

Conflict Between French Leadership

A rift opened between Dupleix and La Bourdonnais after the capture of Madras. La Bourdonnais favored restoring Fort St. George to the English in exchange for a private ransom payment. Dupleix refused, insisting on maintaining French territorial control over Madras. Dupleix overruled La Bourdonnais, who then departed for Mauritius.

The Battle of St. Thome (1746)

Nawab Anwar-ud-din Khan was angered by the French occupation of Madras, as Dupleix had previously promised to hand the fort over to him. The Nawab sent an army of 10,000 men under his son, Mahfuz Khan, to reclaim Madras.

Key Dynamics of the Battle

• The confrontation took place in November 1746 at St. Thome on the banks of the Adyar River near Madras.
• Captain Paradis led a small French force of 230 European soldiers and 700 European-trained Indian sepoys against Mahfuz Khan’s army.
• The French force crossed the river and launched a direct assault using disciplined line formations and rapid field artillery fire.
• The small French detachment defeated the Nawab’s cavalry, forcing his troops to retreat.

Strategic Impact

• The battle revealed the military vulnerability of traditional Indian armies against European battlefield tactics.
• It highlighted the value of rapid-firing field artillery and trained infantry units operating under unified command.
• It proved that Indian soldiers (sepoys), when trained and disciplined by European officers, could defeat far larger native armies.
• European companies realized they could intervene in domestic succession conflicts to gain political power.

Provisions of the Treaty of Aix-la-Chapelle (1748)

The War of the Austrian Succession ended with the signing of the Treaty of Aix-la-Chapelle in October 1748. The treaty brought peace to European combatants and forced a restoration of conquered territories in overseas colonies.

Primary Provisions in the Indian Subcontinent

• The English East India Company regained control of Madras from the French.
• The French East India Company received the strategic fortress of Louisbourg on Cape Breton Island in North America from the British in exchange for Madras.
• All territorial gains made during the war were returned to their original holders, re-establishing the status quo ante bellum.
• The core commercial and naval competition between Britain and France in India remained unresolved.

Summary of the First Carnatic War

Essential Facts and Historical Trivia

The Carnatic region took its administrative boundaries from the subah system established by the Mughal Empire in the Deccan. Robert Clive escaped French-occupied Madras disguised as a native merchant, walking 20 miles south to reach safety at Fort St. David in Cuddalore. Ananda Ranga Pillai, the chief interpreter (Dubash) to Governor Dupleix, recorded daily accounts of French military movements and political decisions in his personal diary. La Bourdonnais was imprisoned in the Bastille for three years upon returning to Paris due to corruption charges filed by Dupleix regarding the ransom of Madras. Rear-Admiral Edward Boscawen led a massive British fleet to siege Pondicherry in 1748, but Dupleix successfully defended the city until monsoon rains forced the British to lift the siege.