Happy Wellesely Day!
1st May 1769 - Arthur Wellesley was born in Ireland, the son of the 1st Earl of Mornington. Wellesley was commissioned as an ensign in the British Army in 1787. Serving in Ireland as aide-de-camp to two successive Lords Lieutenant of Ireland he was also elected as a Member of Parliament in the Irish House of Commons. A colonel by 1796, Wellesley saw action in the Netherlands and later in India, where he fought in the Fourth Anglo-Mysore War at the Battle of Seringapatam. He was appointed governor of Seringapatam and Mysore in 1799, and as a newly appointed major-general won a decisive victory over the Maratha Confederacy at the Battle of Assaye in 1803.
Wellesley rose to prominence as a general during the Peninsular campaign of the Napoleonic Wars, and was promoted to the rank of field marshal after leading the allied forces to victory against the French at the Battle of Vitoria in 1813. Following Napoleon's exile in 1814, he served as the ambassador to France and was granted a dukedom, becoming the 1st Duke of Wellington. During the Hundred Days in 1815, he commanded the allied army which, together with a Prussian army under Blücher, defeated Napoleon at the Battle of Waterloo. Wellesley's battle record is exemplary, ultimately participating in some 60 battles throughout his military career.
He was twice prime minister under the Tory party and oversaw the passage of the Catholic Relief Act 1829. He was prime minister from 1828-30 and served briefly in 1834. He was unable to prevent the passage of the Reform Act 1832 and continued as one of the leading figures in the House of Lords until his retirement. He remained Commander-in-Chief of the British Army until his death.
There's a pretty extensive and detailed page about him over here on Wikipedia.