Following the invasion of France, the formation played a prominent role in the 1814 Battle of Toulouse where it assaulted and seized numerous French redoubts protecting the city.

It was reformed and active for most of the following year, during the War of the Seventh Coalition; held in reserve at the beginning of the Battle of Waterloo, it was committed in the evening to bolster the centre-left of the British line and suffered heavy casualties in the process.

It was active in the early stages of the Second World War, with its component brigades engaged in various parts of the Mediterranean and Middle East theatre.

Following the Battle of Bussaco, on 27 September 1810 during the Peninsular War, Arthur Wellesley (later, the duke of Wellington) ordered the Anglo-Portuguese Army to retreat towards the Portuguese capital of Lisbon and the nearby prepared fortifications, the Lines of Torres Vedras.

Now 5,250 strong, it was posted on the flank of the main British force with a deep ravine to its front that hindered any prospect of a French assault.

[3] In January 1812, the division (alongside the rest of the army) left winter quarters and marched through heavy snow back into Spain.

Following the successful end to the siege, the Anglo-Portuguese Army prepared for an engagement with the main French force in the theater that eventually occurred at the Battle of Salamanca on 22 July.

The division was chosen for this task due to its losses, and to also allow for recently arrived sick troops to be assigned to a formation in a secondary area so that they could acclimatize to Spain and not hinder combat operations.

[6] The division then moved to Navarre, where it and several other formations aimed to deter a French attack while the main body undertook the second siege of San Sebastián.

While the main body of the army moved forward to fight the Battle of St. Pierre on 13 December, the division was initially ordered to remain at Ustaritz.

After a long march to catch up, it arrived in the rear of the British positions towards the end of the battle and played a minor role in the final stages of the fighting and suffered a mere 33 casualties.

[7] In February 1814, the army broke winter quarters and the division moved towards Hasparren to be in a position to interdict any French attempts to lift the siege of Bayonne.

On 11 April 1815, after the outbreak of the War of the Seventh Coalition upon Napoleon's return to power and the arrival of allied reinforcements, the force in the Southern Netherlands was reorganised into divisions of the Anglo-Allied Army.

It was initially based behind the Mont-Saint-Jean farm, which was located behind the centre of the army's line, but moved progressively forward as reserves were committed into the battle.

During the evening, the French succeeded in capturing La Haye Sainte, an occupied farm complex to the front of the Anglo-Allied centre-left, and then immediately pushed forward skirmishers to attack the British frontline.

Under increasing pressure, as French line infantry arrived, additional British reserves were committed including two of the Tenth Brigade's battalions who quickly became heavily engaged.

Both sides remained heavily engaged, while a key moment of the battle unfolded on the centre-right of the line: the French Imperial Guard assaulted and were repulsed.

As the Guard fell back, panic spread among the French infantry, facing the Anglo-Allied centre-left who joined the retreat with the battle ending soon after.

[13] On 30 November, following the signing of the Treaty of Paris, the British force in France was reorganised into the Army of Occupation that consisted of four divisions and did not count the 6th among them.

[19] The Second Boer War broke out on 11 October 1899, after tensions arose between the British Empire, the South African Republic, and the Orange Free State.

The division (minus the 12th Brigade, which had been reassigned to other duties after landing) assembled at Teebus during late January, to guard the lines of communication.

The dark immensity of veldt—the dust-driven, sweltering veldt—and Cronje, miles ahead with his horde, the remnant of his convoy, his women and children, fleeing along the north bank of the Modder, harassed by the Sixth Division...".

[27] While the majority of the 18th Brigade was left to guard the ford across the Modder, one battalion was dispatched towards Magersfontein to determine if any Boers remained and to capture leftover supplies.

[29] Resultingly, the field divisions were broken up by the end of the year, and the troops were dispersed to garrison towns or to create more mobile forces to counter the new Boer tactics.

[32] At the end of July 1916 the division was withdrawn, having suffered 11,000 casualties, and in September it was attached to XIV Corps where it joined in the Battle of the Somme by attacking the German fortification known as the Quadrilateral.

For the rest of the campaign, which ended with the Vichy French surrender on 11 July, the division was engaged with the support of Australian units[38] in attempts to force the Damascus to Beirut road through the Anti-Lebanon Mountains the entrance to which was dominated by the 5,000 feet (1,500 m) high Jebel Mazar.

Eleven days later on 10 October that year it was redesignated the 70th Infantry Division, and Major-General Ronald Scobie assumed command.

[37] On 26 July 2007 the Secretary of State for Defence announced that a new 'HQ 6 Division' would reform to direct the International Security Assistance Force's Regional Command South in Afghanistan.

[40] Des Browne said 'In order to meet these temporary demands we have decided to augment the forces' command structure, and will temporarily establish an additional 2-Star deployable HQ.

During summer 2009, the divisional headquarters was significantly reinforced and transformed into Combined Joint Task Force 6 before deploying to Afghanistan as Regional Command South in November 2009.