Crimean War

The Crimean War was a conflict fought between the Russian Empire and the British Empire and its allies, the French and the Ottoman Empire. (TV: The Evil of the Daleks, War of the Sontarans) The Sontarans saw the conflict merely as the Crimean skirmish. (TV: War of the Sontarans)

History
On 25 October 1854, a commonly known part of the War occurred called the "Charge of the Light Brigade," in which light-cavalry were accidentally made to attack artillery and were killed outright. Agonal, disguised as an officer, actually caused this so he could feed on and enjoy the agony and death. (PROSE: Blood Harvest) The Doctor was present at the Charge of the Light Brigade. (TV: The Evil of the Daleks; AUDIO: The Angel of Scutari)

Arthur Terrall fought in the war. When asked by Jamie McCrimmon about Terrall's erratic behaviour, she said that she had heard Terrall had been wounded in the war. Mollie Dawson's uncle had been killed at the Battle of Inkerman on 5 November of that year. (TV: The Evil of the Daleks)

Nathaniel Whitlock's father also fought at Inkerman. (AUDIO: Moonflesh) In 1872, Major Thessinger told the Sixth Doctor and Peri Brown that he had also fought in the same battle. However, the Doctor realised that he was lying as his account of the battle was both inaccurate and glamourised. (AUDIO: The First Sontarans)

Lev Nikolayevich Tolstoy, who later became famous as the author of War and Peace, served as an envoy to the Russian army during the Crimean War. (AUDIO: The Angel of Scutari) Baron De Guerre also fought in the war. (PROSE: The Vampire of Paris) Edward Fulbright and Roger Bridewell's father served in the Crimea. (PROSE: Evolution)

Miss Florence Woolley's father was killed in the war. (AUDIO: Murder at Moorsey Manor)

In October and November 1854, Hex worked with Florence Nightingale, treating the wounded at the Scutari field hospital. (AUDIO: The Angel of Scutari)

In 1855, during the war, the Twelfth Doctor met Mary Seacole in Balaklava. (AUDIO: The Charge of the Night Brigade)

Undated events
The War Lords kidnapped Crimean War soldiers, including Ivan Petrov, for use in their War Games. The survivors of the Games were returned to Earth after the War Lords were defeated. (TV: The War Games)

Alternate timeline
In an alternate timeline, the Crimean War was fought between the British and the Sontarans instead, as a result of the replacement of Russia and China with Sontar. With the help of the Thirteenth Doctor, the Sontarans are defeated by the British Army's Light Division. (TV: War of the Sontarans)