As a further assurance against war, in 1925, the European powers signed a few treaties at Locarno, Switzerland. These marked the highest point of int’l goodwill between the two World Wars.
Germany signed a treaty with France and Belgium guaranteeing acceptance of their respective frontiers. It also signed treaties with Poland and Czechoslovakia—not guaranteeing their frontiers but undertaking to attempt changing them only by discussion or agreement.
France signed treaties with Poland and Czechoslovakia promising military aid if they were attacked by Germany. France thus strengthened its policy of balancing German power in the East by its own diplomatic alliances and by supporting the Little Entente, as the alliance of Czechoslovakia, Yugoslavia, and Roman was called.
Britain promised military aid in the event of the violation of the French and Belgium frontiers against Germany. It did not give an equivalent to Czechoslovakia or Poland because Britain would only be threatened if Germany pushed westward.