The Second Anglo-Mysore War (1780–1784) was one of the most critical military confrontations in 18th-century South Asia. Fought across the plains of the Carnatic and the Malabar coast, it brought the British East India Company (EIC) closer to absolute defeat in southern India than at any other point in its imperial expansion. The conflict fundamentally reshaped regional alliances, saw the military rise and accession of Tipu Sultan, and forced the British into a humiliating diplomatic settlement.
Origins and Causes of the Conflict
The roots of the war lay in broken promises, shifting alliances, and the global theater of the American Revolutionary War.
- Breach of the 1769 Treaty of Madras: At the end of the First Anglo-Mysore War, the British signed a defensive alliance agreeing to assist Hyder Ali if attacked by a foreign power. When the Maratha Empire invaded Mysore in 1771, the Madras Presidency refused to send military aid, leaving Hyder to fight alone. Hyder never forgave what he viewed as deliberate British betrayal.
- The Global Anglo-French Rivalry: When France entered the American Revolutionary War on the side of the United States in 1778, British forces in India moved swiftly to seize French trading enclaves, capturing Pondicherry that same year.
- The Seizure of Mahe (1779): The flashpoint occurred when British forces moved against the French enclave of Mahe on the Malabar coast. Mahe was situated directly within Hyder Ali’s territory and served as Mysore’s primary lifeline for French arms, gunpowder, and European military advisers. Hyder warned Madras that an attack on Mahe would be treated as an act of war; the British ignored the warning and seized the port.
- The Grand Anti-British Coalition: Outraged, Hyder Ali formed a formidable tri-party alliance uniting Mysore, the Marathas (then fighting the British in the First Anglo-Maratha War), and the Nizam of Hyderabad, creating a unified front against Company expansion.
Key Leaders of the War
| Faction | Prominent Leaders | Roles & Significance |
| Kingdom of Mysore | Hyder Ali | Supreme ruler and strategist; engineered the grand alliance and led the initial blitz into the Carnatic. |
| Tipu Sultan | Eldest son of Hyder Ali; premier field commander whose cavalry tactics and artillery crushed British forces at Pollilur and the Coleroon River. | |
| British East India Company | Warren Hastings | Governor-General of Bengal; directed imperial strategy and diplomatic maneuvers to break Mysore’s alliances. |
| Sir Eyre Coote | Veteran commander dispatched from Bengal to save Madras; secured critical battlefield victories at Porto Novo and Sholinghur. | |
| Col. William Baillie & Sir Hector Munro | Field commanders whose operational missteps led to the British disaster at Pollilur. | |
| French Allies | Admiral Pierre André de Suffren | French naval commander who fought five drawn battles against the Royal Navy off the Coromandel coast, supporting Mysore. |
Course of the War (1780–1784)
Invasion of the Carnatic
July 1780
Hyder Ali swept down the Eastern Ghats with an army of over 80,000 men and 100 guns, devastating the Carnatic up to the suburbs of Madras and cutting off British garrisons.
Disaster at the Battle of Pollilur
September 1780
Tipu Sultan intercepted and annihilated Colonel William Baillie’s detachment of nearly 4,000 men at Pollilur. The battle was notable for Mysore’s devastating use of iron-cased Mysorean rockets against British ammunition tumbrils, resulting in the worst defeat the Company had suffered in India to that date.
Eyre Coote’s Counter-Offensive
1781
Dispatched by Warren Hastings with reinforcements, Sir Eyre Coote checked Hyder Ali’s momentum at the Battle of Porto Novo (July 1781) and won tactical engagements at Pollilur and Sholinghur, preventing the fall of Madras.
Tipu’s Triumph at the Coleroon
February 1782
Near Tanjore, Tipu trapped and destroyed Colonel John Braithwaite’s force of 2,000 men after a 26-hour engagement, capturing all British artillery and ammunition.
Death of Hyder Ali & Succession
December 1782
Hyder Ali died of a cancerous growth near Chittoor while campaigning. Tipu returned rapidly from the Malabar front to secure the throne and maintain army cohesion.
Siege of Mangalore
May 1783 – January 1784
Now ruling as sovereign, Tipu besieged the British garrison at Mangalore. Following the Treaty of Versailles in Europe, the French withdrew their support, leaving Tipu to force the British surrender of Mangalore on his own terms.
How the War Led to Tipu Sultan Becoming King
Before 1782, Tipu was the heir-apparent and leading general, but the de facto ruler was his father, Hyder Ali (who governed in the name of the puppet Wodeyar rajas).
When Hyder Ali died suddenly in his camp in December 1782, the war was at a precarious stage:
- Concealment of Death: Senior ministers, including Purnaiya and Mir Sadik, kept Hyder’s death secret, preserving the body in perfumed oil while dispatching urgent couriers to Tipu on the western coast.
- Preventing Succession Coups: Tipu covered hundreds of miles in record time to reach the main army at Chittoor, preempting rival claims from his brother Karim Shah and court factions.
- Ascension as Sovereign: Acclaimed by the army on December 29, 1782, Tipu assumed full command as the ruler (Padshah / Sultan) of Mysore. He immediately infused the war effort with his own strategic doctrine, focusing on modern fortifications, artillery manufacture, and pushing the British out of Bednur and Mangalore.
The Treaty of Mangalore (1784) and Its Impact
With British finances drained, Warren Hastings facing severe political pressure, and Tipu holding Mangalore and hundreds of British prisoners, both sides negotiated the Treaty of Mangalore in March 1784.
Signed on the principle of status quo ante bellum, the treaty mandated mutual restitution of all conquered territories and the release of all prisoners of war.
Impact on the British East India Company and Future in India
- Diplomatic Humiliation for the Company: The Treaty of Mangalore was the last instance where an Indian state dictated terms to the British East India Company. Lord Macartney, the Governor of Madras, signed the terms on Tipu’s terms, an act that infuriated Governor-General Warren Hastings, who declared that Macartney had made peace “at the cost of the British reputation.”
- Hastings’ Diplomatic Realignment: Hastings successfully detached the Marathas (via the 1782 Treaty of Salbai) and the Nizam from Hyder’s coalition, preventing a catastrophic pan-Indian front. This reinforced the EIC’s core imperial strategy: isolating Indian adversaries one by one.
- Demonstration of Mysore’s Technological Parity: The war proved that European military formations were not invincible. The Mysorean army’s disciplined infantry, heavy cavalry, and pioneered iron-cased rocketry shocked British military observers, prompting William Congreve to later reverse-engineer the rockets in Britain.
- The Inevitability of Future Conflict: The treaty did not resolve the underlying rivalry; it was merely an armed truce. The British realized that Mysore, led by an uncompromising, modernizing ruler who actively courted French and Ottoman alliances, remained the single greatest obstacle to British hegemony in India. This unresolved friction led directly to the Third (1790–1792) and Fourth Anglo-Mysore Wars (1799), which ended with Tipu’s death at Srirangapatna and the consolidation of British dominance over southern India.
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