(1925) Multilateral treaty signed in Locarno, Switz.
, intended to guarantee peace in western Europe. Its signatories were Belgium, Britain, France, Germany, and Italy. Germany's borders with France and Belgium as set by the Treaty of Versailles were decreed inviolable, but its eastern borders were not. Britain promised to defend Belgium and France. Other provisions included mutual defense pacts between France and Poland and between France and Czechoslovakia. The treaty led to the Allied troops' departure from the Rhineland by 1930, five years ahead of schedule. See also Kellogg-Briand Pact .