Chatham Township, New Jersey incorporated as an independent borough and its former village boundaries were expanded between 1891 - 1899 with annexed portions of rural lands that had formerly been within the township. The settlement of Chatham had been established in 1710 as "John Day's Bridge" and, in 1773 when New Jersey was an English province, adopted the name of "Chatham" to honor William Pitt, 1st Earl of Chatham, a British supporter of the colonial cause. This village also had been within Morris Township and it was an active community in the Revolutionary War. On August 19, 1892, Chatham seceded from the new township
John Pitt, 2nd Earl of Chatham Chatham soon acquired a reputation for disorganisation and laziness. Contemporaries noted 'the inconvenience attending his laying in bed till the day is advanced, as officers &c were kept waiting'. During the first major campaign of the French Revolutionary Wars Chatham's Admiralty was blamed in part for the failure of the 1793 siege of Dunkirk. Due to miscommunication between the Board of Ordnance and the Admiralty, the ships carrying siege weaponry and supplies for the besieging forces arrived two weeks late. Although in this instance Chatham does not seem to have been guilty of any neglect, his reputation was fatally compromised.