Baikal Cossacks were Cossacks of the Transbaikal Cossack Host , a Cossack host

Cossack host

A Cossack host or Cossack viysko was an administrative subdivision of Cossacks in Imperial Russia...

 formed in 1851 in the areas beyond Lake Baikal

Lake Baikal

Lake Baikal is the world's oldest at 30 million years old and deepest lake with an average depth of 744.4 metres.Located in the south of the Russian region of Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, it is the most voluminous freshwater lake in the...

 (hence, Transbaikal).

The Transbaikal Cossack Host partially consisted of Siberia

Siberia

Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...

n Cossaks, Buryats

Buryats

The Buryats or Buriyads , numbering approximately 436,000, are the largest ethnic minority group in Siberia and are mainly concentrated in their homeland, the Buryat Republic, a federal subject of Russia...

, Evenk

Evenks

The Evenks are a Tungusic people of Northern Asia. In Russia, the Evenks are recognized as one of the Indigenous peoples of the Russian North, with a population of 35,527...

 (Tungus) military units, and peasant

Peasant

A peasant is an agricultural worker who generally tend to be poor and homeless-Etymology:The word is derived from 15th century French païsant meaning one from the pays, or countryside, ultimately from the Latin pagus, or outlying administrative district.- Position in society :Peasants typically...

 population of some of the regions. The army included three cavalry

Cavalry

Cavalry or horsemen were soldiers or warriors who fought mounted on horseback. Cavalry were historically the third oldest and the most mobile of the combat arms...

 regiment

Regiment

A regiment is a major tactical military unit, composed of variable numbers of batteries, squadrons or battalions, commanded by a colonel or lieutenant colonel...

s and three unmounted brigade

Brigade

A brigade is a major tactical military formation that is typically composed of two to five battalions, plus supporting elements depending on the era and nationality of a given army and could be perceived as an enlarged/reinforced regiment...

s. Its main purpose was to patrol the Sino

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

-Russian border and perform everyday military duties. Nakazny ataman

Ataman

Ataman was a commander title of the Ukrainian People's Army, Cossack, and haidamak leaders, who were in essence the Cossacks...

(the one who was appointed) was in charge of the Transbaikal Cossack Army. He would also serve as a military governor of the Transbaikal oblast

Oblast

Oblast is a type of administrative division in Slavic countries, including some countries of the former Soviet Union. The word "oblast" is a loanword in English, but it is nevertheless often translated as "area", "zone", "province", or "region"...

 with its headquarters

Headquarters

Headquarters denotes the location where most, if not all, of the important functions of an organization are coordinated. In the United States, the corporate headquarters represents the entity at the center or the top of a corporation taking full responsibility managing all business activities...

 in Chita, starting from 1872.

In the early 20th century, the Transbaikal Cossack Host normally supplied one polusotnya of guards (fifty men), four cavalry regiments, and two batteries

Artillery battery

In military organizations, an artillery battery is a unit of guns, mortars, rockets or missiles so grouped in order to facilitate better battlefield communication and command and control, as well as to provide dispersion for its constituent gunnery crews and their systems...

 in the times of peace. During the World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

, it supplied one polusotnya, nine cavalry regiments, four batteries, and three reserve sotnyas (one hundred men). In 1916, the Cossack population of the Transbaikal Cossack Host numbered 265,000 people, out of which 14,500 men served in the military.

The Transbaikal Cossack Army is known to have participated in the suppression of the Boxer Rebellion

Boxer Rebellion

The Boxer Rebellion, also called the Boxer Uprising by some historians or the Righteous Harmony Society Movement in northern China, was a proto-nationalist movement by the "Righteous Harmony Society" , or "Righteous Fists of Harmony" or "Society of Righteous and Harmonious Fists" , in China between...

 in 1899-1901, Russo-Japanese War

Russo-Japanese War

The Russo-Japanese War was "the first great war of the 20th century." It grew out of rival imperial ambitions of the Russian Empire and Japanese Empire over Manchuria and Korea...

 of 1904–1905, and World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. During the Russian Civil War

Russian Civil War

The Russian Civil War was a multi-party war that occurred within the former Russian Empire after the Russian provisional government collapsed to the Soviets, under the domination of the Bolshevik party. Soviet forces first assumed power in Petrograd The Russian Civil War (1917–1923) was a...

, the more prosperous Cossacks joined the ranks of the anti-Soviet armies of General

General

A general officer is an officer of high military rank, usually in the army, and in some nations, the air force. The term is widely used by many nations of the world, and when a country uses a different term, there is an equivalent title given....

 Grigory Semenov and baron Roman Ungern. The poorer Cossacks took active part in the guerrilla

Guerrilla warfare

Guerrilla warfare is a form of irregular warfare and refers to conflicts in which a small group of combatants including, but not limited to, armed civilians use military tactics, such as ambushes, sabotage, raids, the element of surprise, and extraordinary mobility to harass a larger and...

 movement.

In 1920, by the end of the Russian Civil War

Russian Civil War

The Russian Civil War was a multi-party war that occurred within the former Russian Empire after the Russian provisional government collapsed to the Soviets, under the domination of the Bolshevik party. Soviet forces first assumed power in Petrograd The Russian Civil War (1917–1923) was a...

, the Transbaikal Cossack Host was disbanded.