Tsar Nicholas II of Russia and his immediate family and retainers are executed by Bolshevik Chekists at the Ipatiev House in Yekaterinburg, Russia.

Nicholas II was the last reigning Emperor of Russia, King of Congress Poland, and Grand Duke of Finland from 1 November 1894 until his abdication on 15 March 1917. He married Alix of Hesse and had five children: the OTMA sisters – Olga, born in 1895, Tatiana, born in 1897, Maria, born in 1899, and Anastasia, born in 1901 — and the tsesarevich Alexei Nikolaevich, who was born in 1904.

The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about 22,800,000 km² (8,800,000 sq mi), roughly one-sixth of the world's landmass, making it the third-largest empire in history, behind only the British and Mongol empires. It also colonized Alaska between 1799 and 1867. The empire's 1897 census, the only one it conducted, found a population of 125.6 million with considerable ethnic, linguistic, religious, and socioeconomic diversity.

The abdicated Russian Imperial Romanov family were shot and bayoneted to death by Bolshevik revolutionaries under Yakov Yurovsky on the orders of the Ural Regional Soviet in Yekaterinburg on the night of 16–17 July 1918. Also murdered that night were members of the imperial entourage who had accompanied them: court physician Eugene Botkin; lady-in-waiting Anna Demidova; footman Alexei Trupp; and head cook Ivan Kharitonov. The bodies were taken to the Koptyaki forest, where they were stripped, mutilated with grenades and acid to prevent identification, and buried.

The Bolsheviks, led by Vladimir Lenin, were a radical faction of the Marxist Russian Social Democratic Labour Party (RSDLP) which split with the Mensheviks at the Second Party Congress in 1903. The Bolshevik party, formally established in 1912, seized power in Russia in the October Revolution of 1917, and was later renamed the Russian Communist Party, All-Union Communist Party, and ultimately the Communist Party of the Soviet Union. Its ideology, based on Leninist and later Marxist–Leninist principles, became known as Bolshevism.