|Born:||20 June 1760, Dangan Castle, Ireland|
|Died:||26 September 1842, Knightsbridge, London, United Kingdom|
|Previous offices:||Lord Lieutenant of Ireland (1821–1828), Governor-General of India (1798–1805)|
|Organization founded:||Fort William College|
• Subsidiary alliance system with Hyderabad Nizam
• 4th Mysore War (1799)
• 2nd Maratha War (1803-05)
• Took over Tanjore (1799), Surat (1800), and Carnatic (1801)
• Treaty of Bassein (1802)
• Fort William College in Calcutta
• Famous as Bengal Tiger
In 1799, his forces invaded Mysore and defeated Tipu, the Sultan of Mysore, in a major battle. He also initiated the Second Anglo-Maratha War. Lord Wellesley established the Subsidiary Alliance system that brought the princely kingdoms under British rule. This was the most successful means of expanding British territory and political power in India.
The Nizam of Hyderabad was the first to accept a well-framed subsidiary alliance in 1798. After the Third Anglo-Maratha War (1817–19), Maratha ruler Baji Rao II also accepted a subsidiary alliance.