Cossacks were simultaneously both an
ethnicity and a grouping of special
social estates in the Russian Empire from the 16th to the early 20th century. Because of their military tradition, Cossack forces played an important role in Russia's wars of the 17th–20th centuries such as the
Crimean War (1853–1856), the
Napoleonic Wars, various Russo-Turkish Wars, and the
First World War of 1914–1918. In the late 19th and early 20th centuries, the
tsarist regime deployed Cossack detachments to perform police service and to suppress revolutionary movements, especially
in 1905–1907. Following the
October Revolution of 1917, a conflict broke out between the new
Bolshevik Communist regime in
Russia and many Cossacks. In the Don territory, the
Ataman of the
Don Cossacks,
Alexey Kaledin, declared that he would "offer full support, in close alliance with the governments of the other Cossack hosts" to
Kerensky's forces (the Bolsheviks' opponents in the civil war). Establishing ties with the
Ukrainian Central Rada and with the
Kuban,
Terek, and
Orenburg hosts, Kaledin sought to overthrow the
Soviet regime in Russia. On 15 November 1917,
White Generals
Kornilov,
Alekseev and
Denikin began to organize a force that would become the
Volunteer Army in the Cossack cultural capital,
Novocherkassk. Imposing martial law, Cossack leader Kaledin started to advance in late November. On , after a seven-day battle, his forces occupied
Rostov. However, on , Bolshevik troops pushed back successfully and occupied Rostov and Novocherkassk. The remnants of the
White Cossacks, headed by Ataman , fled into the , in an event known as the
Steppe March. After the
Imperial German army invaded and occupied Rostov on 8 May 1918, a government headed by Ataman
Krasnov was formed in the
Don province. In July 1918, the White Cossack forces of Ataman Krasnov launched their first
invasion of Tsaritsyn (present-day Volgograd). Soviet forces counterattacked, however, and drove out the White Cossacks by 7 September. On 22 September, Krasnov's forces launched a second invasion of Tsaritsyn, but by 25 October Soviet troops had pushed Krasnov's forces back beyond the
Don. On 1 January 1919, Krasnov launched a third invasion of Tsaritsyn. Soviet forces repelled the invasion again and forced Krasnov's forces to withdraw from Tsaritsyn in mid-February 1919. == History ==