[6] The regiment took part in Sir Samuel Auchmuty's disastrous expedition to the River Plate in October 1806, including the occupation of Montevideo in February 1807 during the Anglo-Spanish War.

[8] The regiment then embarked for Portugal and fought at the Battle of Arroyo dos Molinos, capturing General De Brune of the French Army, in October 1811 during the Peninsular War.

[14] Following the murder of the British ambassador and his guards at Kabul in September 1879, the regiment saw action at the Battle of Charasiab in October 1879 during the Second Anglo-Afghan War.

[12] The commanding officer of the regiment, Lieutenant-Colonel Robert Cleland, was killed while leading a charge at the Battle of Killa Kazi in December 1879.

[12] Major-General Frederick Roberts described the ensuing events: "The charge was led by Lieutenant-Colonel Cleland and Captain Neville, the former of whom fell dangerously wounded: but the ground, terraced for irrigation purposes and intersected by nullahs, so impeded our cavalry that the charge, heroic as it was, made little or no impression upon the overwhelming numbers of the enemy.

[24] In addition to the lack of conflicts, their relative inactivity was also due to the military high command struggling to decide what role cavalry regiments could perform in modern warfare.

Lances ceased to be carried by the six lancer regiments in the British Army for active service in 1928, though the impressive if archaic weapon was retained for ceremonial parades and guard duties.

[12] Withdrawn to England, the regiment landed in North Africa in September 1941 and undertook a leading part in the First Battle of El Alamein in July 1942.

[12] According to General Sir Richard McCreery: "The 9th Lancers took part in many decisive battles, none more so perhaps than the long withdrawal from Knightsbridge, south of Gazala, to El Alamein.

Many think that Egypt was saved when the Eighth Army defeated Rommel's last big attack in the Western Desert at the end of August 1942.

Throughout that long withdrawal from Knightsbridge, when the fluctuating Battle of Gazala had finally swung against the Eighth Army, past Sollum and Matruh to the Ruweisat Ridge, only seventy miles from Alexandria, the 2nd Armoured Brigade with the 9th Lancers always there but often reduced to only a handful of tanks, fought on skilfully and with gallant endurance and determination.

"[28] The regiment's marksmanship was renowned; their best shot was Corporal Nicholls of B Squadron, who was once personally congratulated by General Bernard Montgomery for knocking out nine enemy tanks in one day.

[12] The regiment landed in Italy in mid-1944, where it saw action at San Savino in the battle for the Gothic Line in September 1944 on the Italian Front.