General John Pitt, 2nd Earl of Chatham, KG, PC (10 October 1756 – 24 September 1835) was a British soldier and politician. He is best known for commanding the disastrous Walcheren Campaign of 1809.Chatham was the eldest son of William Pitt, 1st Earl of Chatham. He was two and a half years older than his famous brother William Pitt the Younger, the future prime minister.