The Jay Treaty, also known as the Treaty of Lonon of 1794, between the United States and Great Britain averted war, solved many issues left over from the American Revolution, and opened ten years of largely peaceful trade in the midst of the French Revolutionary Wars. It was highly contested by Jeffersonians but passed Congress and became a central issue in the formation of the First Party System. The treaty was signed in November 1794, but was not proclaimed in effect until February 29, 1796.