Willem Frederik, Prince of Orange, who had meanwhile returned from exile was appointed King William I. But the new union soon began to falter, and there was growing unrest. Even the Ten Days’ Campaign led by William I and his son William II could not prevent the secession of the southern Netherlands and the formation of the Kingdom of Belgium. A constitutional amendment in 1848 significantly limited royal powers in the Kingdom of the Netherlands. In 1879, 62-year-old King William III married Emma, a German princess. The birth of their daughter Wilhelmina secured the continuation of the dynasty.
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