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In page Basel-Landschaft:

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After 1830 there were political quarrels and armed conflict in the canton of Basel. Some of these were concerned with the rights of the population in the agricultural areas. They ultimately led to the separation of the canton Basel-Landschaft from the city of Basel on 26 August 1833. Since then, there has been a movement for reunification. This movement gained momentum after 1900 when many parts of Basel-Landschaft became industrialized. The two half cantons agreed in principle to merge, but in 1969 the people of Basel-Landschaft voted down a referendum on this proposal in favour of retaining their independence. It is thought that the closing economic gap between the two cantons was the main reason why the population changed their attitude.[citation needed]