A treaty of peace having been concluded with the Americans, hostilities ceased, and the Sixth reposed a short period in quarters.
1815
In the summer of 1815, the return of Buonaparte to France having rekindled the flame of war in Europe, the Sixth were directed to embark from America, in order to engage once more in actual warfare. They left Canada in the beginning of July, landed at Ostend on the 10th of August, and proceeded to Ghent, from whence they continued their march to Paris, and joined the army commanded by Field-Marshal His Grace the Duke of Wellington, encamped near that city. The Sixth, sixteenth, fifty-eighth, and eighty-second regiments formed the fifteenth brigade, and were posted in the seventh division, commanded by Major-General Thomas Brisbane.
When the definitive treaties between France and the allied powers were settled, the Sixth were selected to form part of the army of occupation in France, and constituted, with the twenty-ninth and seventy-first regiments, the sixth brigade of infantry, under Major-General Sir Thomas Bradford, in the second division, commanded by Lieut.-General Sir Henry Clinton. The Sixth were quartered at Versailles, from whence they marched, in December, to Ecouen, a village on the road from Paris to Luzarches.
On the 24th of December, 1815, the second battalion was disbanded at Winchester.
1816
The Sixth remained in the neighbourhood of Ecouen until the 23rd of January, 1816, when they marched for St. Pol in the Pas de Calais, and in February three companies occupied Lillers, and seven the adjacent villages.
In August, 1816, the regiment proceeded to the vicinity of St. Omer, and encamped, with the remainder of the second division of the British contingent of the army of occupation, on Helfant Heath. In October it proceeded to the plains of Denain, near Valenciennes, where the British contingent was reviewed by Field-Marshal His Grace the Duke of Wellington on the 22nd of that month. After the review the regiment returned to its former cantonments at Lillers and the neighbouring villages.
1817
1818
The Sixth were again encamped on Helfant Heath in July, 1817; in September they pitched their tents on the glacis of Valenciennes, near the Quesnoy gate; and on the 6th of that month were reviewed, with the remainder of the British infantry, by the King of Prussia. They removed in October to the plains of Denain, where the British contingent was reviewed by the Duke of Wellington on the 15th of October; on the 20th the Sixth returned to their former quarters at Lillers, &c. In these quarters they remained until June, 1818, when they once more pitched their tents on Helfant Heath, where they were reviewed by Lieut.-General Lord Hill on the 24th of June, and by the Duke of Wellington on the 31st of July. In August they again pitched their tents on the glacis at Valenciennes. On the 10th of September the British, Saxon, Danish, and Hanoverian armies, commanded by the Duke of Wellington, were reviewed by His Royal Highness the Duke of Kent; and on the 23rd of October, the same troops, and also the Russian contingent, were reviewed by the Emperor of Russia, King of Prussia, &c. After the review, the army of occupation was withdrawn from France. The Sixth embarked at Calais on the 29th of October, landed on the morning of the 30th at Dover, and marched to Romford in Essex, where the establishment was reduced to ten companies, of thirty-nine officers, thirty-five serjeants, thirty corporals, twenty-two drummers, and six hundred and twenty private men.