During the American Revolutionary War, Detroit was an important British supply center. Most of the inhabitants were French-Canadians or Native Americans, many of whom had been allied with the French. Because of imprecise cartography and unclear language defining the boundaries in the 1783 Treaty of Paris, the British retained control of Detroit and Michigan after the American Revolution. When Quebec split into Lower and Upper Canada in 1791, Michigan was part of Kent County, Upper Canada. It held its first democratic elections in August 1792 to send delegates to the new provincial parliament at Newark (now Niagara-on-the-Lake).