Chagdarjav was born in 1880 in present-day Selenge Province. He was a member of the quasi-provisional government established in Khüree in 1911 as the Qing dynasty of China was collapsing and was later appointed Minister of Finance under the Bogd Khan's first government.^[2] He took part in negotiations during the Kyakhta Conference in which Mongolia sought international recognition of its status as an independent state, but ultimately had to settle for recognition of a de facto autonomy under Chinese auspices.

Leaving government service in 1915, Chagdarjav pursued a career as a private trader traveling to Great Britain, Italy and Russia in 1916–1917.^[3]

Formation of the MPRP edit

In 1919 Chagdarjav joined the secret revolutionary group Konsulyn Denj (Consulate Hill) in Khüree (present-day Ulaanbaatar). Together with Dogsomyn Bodoo, Khorloogiin Choibalsan, and Darizavyn Losol he formed the basic nucleus of the group^[4] which joined with Damdin Sükhbaatar's Züün Hüree organization in June 1920 to form the Mongolian People's Party (MPP).^[5]

Chagdrajav was one of seven revolutionaries (the famous "First Seven") chosen to travel to the USSR in June 1920 to establish contact with the Soviets. Other delegates included Soliin Danzan, Dansrabilegiin Dogsom, Damdin Sükhbaatar, Khorloogiin Choibalsan, Dogsomyn Bodoo and Darizavyn Losol. Chagdrajav and Danzan traveled together to Moscow where they met with Vladimir Lenin.

Chagdarjav was appointed prime minister of the provisional revolutionary government established at a secret MPP meeting in the Russian-Mongolian border town of Troitskosavsk from March 1–3, 1921 (later known as the First Party Congress of the MPRP).^[6] However, just over a month later, on April 16, 1921, he was relieved of his duties and dispatched as the party's representative to Urianhay (Tuva).^[7] Bodoo then took over as both Prime Minister and Foreign Minister.

Soon after the victory of the Outer Mongolian Revolution of 1921, strife erupted within the party as various factions jockeyed for power, particularly between Soliin Danzan and Prime Minister Bodoo. In 1922, Danzan accused Bodoo, Chagdarjav and others of plotting with the charismatic independence leader Ja Lama as well as with the Chinese and Americans, to undermine the revolution and establish an autocratic government. Despite Bodoo's resignation from government on January 7, 1922,^[8] Danzan nevertheless pursued the charges. Chagdarjav, Bodoo, Da Lama, Puntsagdorj and other former ministers^[9] were arrested and interrogated by a Russian agent. Chagdarjav and Bodoo were executed on August 31, 1922.^[10] The deaths of Chagdarjav and Bodoo are generally viewed as the first in a series of political purges that would take place in Mongolia through the 1920s and 1930s.