In the spring of 1815, while the Congress at Vienna was deciding on the boundaries of kingdoms, and the people of all countries were looking forward to a period of peace, Bonaparte suddenly violated his engagements, re-appeared in France, and the French army declaring in his favour, he reascended the throne he had abdicated. War was immediately declared against the usurper; the order for disbanding the third battalion of the FOURTEENTH Regiment was consequently rescinded, and on the 21st of March, (three days before the date fixed upon for its being disbanded,) the battalion received directions to embark for Flanders: it landed at Ostend on the 31st of March, and formed part of the army commanded by His Royal Highness the Prince of Orange. Additional forces were sent to Flanders, Field Marshal his Grace the Duke of Wellington assumed the command, and the third battalion of the FOURTEENTH Regiment, commanded by Lieutenant-Colonel FRANCIS S. TIDY, (Major of the regiment,) was formed in brigade with the Twenty-third Royal Welsh Fusiliers, and Fifty-first Light Infantry under Colonel Mitchel, and constituted part of the fourth division, commanded by Lieutenant-General the Honorable Sir Charles Colville, K.C.B. Bonaparte attempted, by one of those rapid advances for which he had always been celebrated, to interpose between the British and Prussian armies, and on the 16th of June the battles of Ligny and Quatre Bras were fought: the British were victorious; but the Prussians were defeated; and the Duke of Wellington retreated, on the 17th of June, to the position in front of the village of Waterloo, to preserve his communication with Prince Blucher.