As early as 1825, while revolutionaries were still engaged in the Greek War of Independence, attempting to establish a Kingdom of Greece (which transpired with the London Conference of 1832), Louis' name was mentioned as a possible candidate as the first modern King of Greece. In February 1831, five months before revolutionaries succeeded in the Belgian Revolution, which established the Kingdom of Belgium, Louis was nominated to be the first King of the Belgians; international considerations deterred Louis-Philippe from accepting the honour for his son. Prince Louis did accompany the French "Armée du Nord" that entered Belgium to support its separation from the United Kingdom of the Netherlands; there he took part in the Siege of Antwerp (1832).