Sussex is a Canadian town in Kings County, New Brunswick.Sussex straddles the Kennebecasis River, 70km northeast of Saint John, and is a major dairy products producer in the province. It is home to Atlantic Canada's largest hot air balloon festival.HistoryIn 1857 the European and North American Railway was opened, connecting the farming communities of the Kennebecasis River valley with Saint John and Moncton. Sussex was incorporated in 1895 but was only officially established as a town on April 29, 1903. The settlers were for the most part British Loyalists who had fled the American Revolution in 1776, with many Irish refugees of the potato famine from the mid-19th century settling in the nearby farming communities.In 1885, the Sussex Military Camp was established on the eastern edge of the town. The facility was closed following the Second World War and the town purchased the land to expand the municipal boundaries. Today the agricultural exhibition and some areas remain as open land on the former site of Camp Sussex.