As the collective security system of the League of Nations started to crack with the Abyssinia crisis, and the approach of World War II, Sweden could look back on 120 years of successful neutralist politics – with one singular exception: the backup force on Jutland during the First war of Schleswig. Sweden now pursued a policy of forging a block of neutralist countries in Northern Europe. Belgium, the Netherlands, Denmark, Norway, Finland and the Baltic States were all members of this club of neutral states. Of them, only Sweden would be fortunate enough to remain unattacked during World War II.