http://en.wikipedia.org/wiki/Danish_minority_of_Southern_Schleswig said:
After World War II, many people chose to join the Danish minority in hopes of joining the much more prosperous Denmark, partly caused by a wish to live in a free and democratic country, partly motivated by social hardships in the aftermath of the war that played another distinctive role, especially as over one million refugees had come to Schleswig-Holstein and also a high proportion of the 'new Danes' had a lower class background, while only very few of the old elite changed nationality. As the Danish government provided food aid to the minority during 1945–49 this contingent became derogatorily known as "Speckdänen",ie. "bacon Dane". At the end of 1946 the minority had thus reached a membership of 62,000 and in 1948 78,000. The Danish political party got almost 99,500 votes in 1947.
However, the Danish government and the British Occupation Zone governors both opposed Southern Schleswig rejoining the Kingdom, and a referendum was never held in Southern Schleswig. Controversy over the issue divided two of the main Danish parties, and both Venstre leader and Prime Minister Knud Kristensen and Conservative leader John Christmas Møller ultimately broke with their respective parties over the issue.