With the surrender of Antwerp, the French withdrew their army, but the Dutch sullenly refused to recognise the victory until the year 1839, when they withdrew from and dismantled the forts on the Scheldt facing Antwerp. Naturally the support of the French and English brought about a deep and lasting feeling of gratitude on the part of the Belgians. Louis Philippe said, "Belgium owes her independence and the recovery of her territory to the union of France and England in her cause." Her independence thus gained and recognised, Belgium turned her attention to the development of the country and its rich natural resources. The Manufactures flourished, her mines of coal and iron became famous throughout the world, and she trod the peaceful path of strict neutrality among the great nations. Passing over the all familiar history of Waterloo, one may quote the saying of M. Northomb: "The Battle of Waterloo opened a new era for Europe, the era of representative government." And this new era was enjoyed by Belgium until the Franco-Prussian War confronted the little country with a fresh crisis, and one fraught with danger. Although her absolute neutrality had been earnestly proclaimed and presented to the powers, it was feared that she might be invaded and be unable to maintain her integrity by her military force. Leopold promptly mobilized the army and massed it upon the frontier. During and after the battle of Sedan, a large number of both French and German soldiers crossed the border and were interned until the close of the war.... Once more peace descended upon the Belgians, for a fresh treaty prepared by England and signed by both France and Prussia engaged the British Government to declare war upon the power violating its provisions. After his acceptance of the Crown of Belgium, the Constitution declared the monarchy hereditary in the male line of the family of Prince Leopold of Saxe-Coburg, which consisted of two sons and one daughter. The elder of the sons was born in 1835, and succeeded his father as Leopold II, in 1865. The Austrian Archduchess Marie Henriette became his wife in 1853, and their descendants were one son and three daughters, none of whom is now living. The Salic Law prevailing in Belgium, the history of the female descendants is not of political importance. The only son of Leopold II dying in 1869, the succession passed to the brother of the King, the Count of Flanders, who married Mary, Princess of Hohenzollern, a sister of the King of Roumania.