Had the war continued for a longer period of time, Germany or the Allies might have had no choice but to invade Sweden in order to thwart enemy advances. If Germany had been able to sustain its successes on the battlefield beyond 1943, and been capable of bringing the war to an end favorable to its own terms, Sweden would have had no choice but to join the new order of Europe, a new order under the domination of Nazi Germany. Germany would not have allowed a country to exist on the sidelines in the new order of Europe, and Sweden would have had to abandon its long-cherished policy of neutrality. However, German domination of Europe did not succeed and Sweden was left on its own. Sweden's ability to maintain its policy of neutrality until the war's end was due in large part to luck, since events out of its control played the largest part in the fate of Sweden's policy of neutrality.