During the interwar period, Romania's greatest goal was to defend the country's new borders against the Soviet Union and Germany, as well as the revisionist Bulgaria and Hungary. Romanian politicians saw the United Kingdom and especially France as the defenders of peace that made this possible. The country also supported the establishment of the League of Nations and other regional alliances (Balkan Pact and Little Entente) to counter its enemies. However, Romania never managed to improve its relations with Hungary and the Soviet Union. The former insisted on the return of Transylvania, while the latter never accepted the loss of Bessarabia. Romanian leaders trusted the assumed hostility between Nazi Germany and the Soviet Union that maintained a balance of power. That is why the non-aggression pact signed on 23 August 1939 between the two shocked them, causing great insecurity in the country. In addition, under the secret terms of the pact, Nazi Germany had already recognized the Soviet interest in Bessarabia.