The Charge of the Light Brigade was a charge of British light cavalry led by Lord Cardigan against Russian forces during the Battle of Balaclava on 25 October 1854 in the Crimean War.
 Lord Raglan, overall commander of the British forces, had intended to send the Light Brigade to prevent the Russians from removing captured guns from overrun Turkish positions, a task well-suited to light cavalry.
Calthorpe was the fourth son of Frederick Gough, 4th Baron Calthorpe and Lady Charlotte Somerset, daughter of the 6th Duke of Beaufort.
 He joined the 8th Hussars in 1849, rising to Brevet major by 1855.
 During the Crimean War he served as ADC to Lord Raglan.
 Lord Cardigan sued Calthorpe for his eyewitness account of the Charge of the Light Brigade in his memoir "Letters from Headquarters, Or Realities of the War in the Crimea", but the action failed.
 He became lieutenant-colonel in 1861, commanding the 5th Dragoon Guards.
 He was the first chairman of the Isle of Wight County Council, and was a JP both there and in his native Midlands.
The Battle of Ostrovno (French: "Combat d'Ostrowno") was a military engagement that took place on 25 July 1812, between French forces under the command of King of Naples Joachim Murat and Russian forces under General Ostermann-Tolstoy and ended with the Russian forces retreating from the battlefield.
Pavel Petrovich Pappengut (also Papengut) (Russian: Па́вел Петро́вич Папенгут ) (May 27, 1894 – December 1933) was a colonel of the Russian Empire, later officer of the White Russian forces, member of the underground , comrade-in-arms of Alexander Dutov, later white emigre to China, the military commander of White Russian forces in Xinjiang during the Kumul Rebellion in 1933.
Chandos Sydney Cedric Brudenell-Bruce, 7th Marquess of Ailesbury (26 January 1904 – 15 July 1974), styled Earl of Cardigan or Lord Cardigan between 1911 and 1961, was a British peer.
William Murrell (1853–1912) was an English physician, clinical pharmacologist, and toxicologist.
 Murrell is best known for being one of the first to recognize the clinical benefits of glyceryl trinitrate (also known as nitroglycerin) for the management of patients with angina pectoris.
Battle of Krzykawka was a military engagement that took place during the January Uprising on May 5, 1863, between Russian forces and Polish insurgents and foreign (French and Italian) volunteers allied with them.
 It took place close to the village of Krzykawka near Olkusz.
 The Polish forces were led by general Józef Miniewski and included the Italian Garibaldi Legion under the command of Francesco Nullo.
 The outcome of the engagement was a victory for the Russian forces.
Canon William Murrell Lummis MC (4 June 1886 – 2 November 1985) was a British military historian most noted for the research he conducted on the Victoria Cross, the Charge of the Light Brigade, and Rorke's Drift.
Nene Hatun (1857 – 22 May 1955) was a Turkish folk heroine, who became known for fighting against Russian forces during the recapture of Fort Aziziye in Erzurum from Russian forces at the start of the Russo-Turkish War of 1877–1878.
The Battle of Holowczyn or Holofzin or Golovchin was fought between the Russian forces, and the Swedish army, led by Charles XII of Sweden, only 26 years of age at the time.
 Despite difficult natural obstacles and superior enemy artillery, the Swedes were able to achieve surprise and defeat the numerically superior Russian forces, who were separated from each other, had no overall command and could not coordinate their actions, so that only 8,000-9,000 of them could take part in the fighting.
 Reportedly, it was Charles' favourite victory.

Question: Canon William Murrell Lummis MC conducted research on what event led by Lord Cardigan against Russian forces in 1854?
Answer: Charge of the Light Brigade