Amar (literally meaning "peace/peaceful" in the Mongolian language) was born in 1886 in present-day Khangal district of Bulgan Province (then called Daichin Van Khoshuu in Tüsheet Khan Province) in north-central Mongolia. The son of a poor nobleman, the "khokhi taij" or "impoverished prince" Anand, Amar studied Mongolian, Manchu and Classical Tibetan in the Khoshuu school. He then worked his way up from being a local official to a position in the foreign ministry of Autonomous Mongolia from 1913 to 1919.
He joined the Mongolian People’s Party in 1923, and was elected to the Presidium (Politburo) of the MPRP Central Committee in August 1924. He also served concurrently as a member of the 1st through 7th Small Hurals. From 1923 to 1928 Amar served as deputy prime minister while also holding various other government portfolios at different times including; minister of foreign affairs, minister of internal affairs, and president of the economic council.
Amar was appointed prime minister on February 21, 1928 following the death of Balingiin Tserendorj. The Soviets, already suspicious of the prestige he enjoyed in Mongolia, curtailed his authority by promptly assigning him to work in the Institute of Manuscripts. Amar's first term as prime minister ended on April 27, 1930.
From 1930 to 1932 he was chairman of the science committee during which time he authored two books; The Tenth Anniversary and Scientific Production (1931) and On the Development of the Mongolian National Script (1933). From 1932 to 1936 he served as chairman of the presidium of the Small Hural (titular head of state).
In 1934 he authored the Short History of Mongolia. In the prologue he wrote:
“It is truly unbearably sad that the Mongol ethnicity, despite having since ancient times and especially in the time of Genghis Khan run a glorious path of development among the countries of Asia and Europe, should in these latter days have been divided into many parts, with some unable to protect and safeguard their ethnic roots, customs, land and property, revering a powerful foreign entity while not having any power or policy to carry out their own affairs or accomplish pertinent actions, not only subjecting themselves to others' authority but actually striving to accomplish the policies and interests of foreign entities. Imperialist nations such as the Manj (Manchus) and Khyatad (Chinese), who have historically tried to convert the Mongol nation into their trading shops and establish their own sole hegemony while fixing prices at their own whim for exploitative purposes, are now at this very moment fighting amongst each other to convert our own nationally identical Inner Mongolia into their trading shop. And so it is that the Mongol nation of animal husbandry (Inner and Outer Mongolia) has fallen so low as to meet the fate of becoming a trading shop of other nations.”
Amar was appointed prime minister for the second time (and concurrently foreign minister) on March 22, 1936 following Peljidiin Genden's removal from both offices. Genden had resisted Soviet pressure to destroy Mongolia’s Buddhist churches and had publicly scolded Joseph Stalin at a Mongolian Embassy reception. Although Amar was the new prime minister, Khorloogiin Choibalsan became Stalin’s new favorite and as head of the newly created Internal Affairs Ministry was the de facto most powerful person in Mongolia. Choibalsan increased his power in May 1936 when he had the Internal Affairs Committee rules amended to facilitate the detention high ranking politicians without first consulting political superiors.
Shortly after becoming prime minister in 1936, Amar and Dansranbilegiin Dogsom, the chairman of the presidium of the Small Hural, aggravated Choibalsan and Moscow alike when they pardoned prisoners implicated in the Lkhümbe affair in honor of the fifteenth anniversary of the revolution. Amar's enemies, particularly Choibalsan, used the event to connect him to the fictitious Lkhümbe spy ring. Amar was increasingly accused of participating in counterrevolutionary activity causing Choibalsan to exclaim “We must get rid of this feudal trouble maker Amar!"
Amar was powerless to prevent the large scale purges that Choibalsan and NKVD advisers embedded within the interior ministry unleashed on the country from 1937 to 1939. At the first show trial, staged at the Central Theater from October 18 to 20, 1937, Amar openly wept as close friends were sentenced to death.
Because of Amar's continued popularity among Mongolians, Stalin was eager to eliminate him. He instructed Choibalsan to have party leader Dorjjavyn Luvsansharav launch a propaganda campaign against the popular prime minister. On March 6, 1939 Luvsansharav denounced Amar at an enlarged meeting of the MPRP Central Committee saying he “had helped anti-government plotters, opposed their arrest, and neglected the defense of the borders. He betrayed his own country and was a traitor to the revolution." Once Choibalsan seconded the condemnation, opinions within the Central Committee rapidly turned against Amar.
When Amar took the floor in his own defense he said:
“Although I believe in religion, the one thing that I believe in even more is that Mongolia should stand firmly on her feet to become an independent country. I love my country. I have shown this with my work. I have been among the first to devote myself to the cause of my country’s development, and my heart is breaking to finally witness myself being called a traitor and being subjected to castigation”
Amar was found guilty at the end of the one-day trial. He was removed from the office of prime minister, expelled from the MPRP, and then arrested by Ministry of Internal Affairs. In July 1939 Amar’s case passed to the NKVD, and Amar was sent to Siberian town of Chita and then on to Moscow. With Amar’s removal, Choibalsan was named prime minister and became Mongolia’s uncontested leader, simultaneously holding the office of prime minister, minister for internal affairs, minister of war, and Commander in Chief of the Mongolian armed forces.
In Moscow, Amar was tortured into making a full confession to all of the accusations made against him. Ironically, while awaiting trial in Moscow Amar was jailed with Luvsansharav, the very same person who had arrested him and who had also fallen victim to Choibalsan's purges shortly thereafter.
On July 10, 1941 Amar was tried by a Soviet troika and sentenced to death. Throughout the trial Amar insisted that, if the Mongolian People’s Republic were really an independent nation, he should be tried by a Mongolian court. His last recorded words were “it is typical that when a big power colonizes a small country, its leaders are arrested and persecuted. My personal experience demonstrates this attitude of the USSR towards Mongolia”.
He was immediately executed at the firing ground "Kommunarka" (Russian: Расстре́льный полиго́н «Коммуна́рка») near Moscow, his body is buried there.
On December 15, 1956, after reviewing Stalin’s purges, military collegiums found no evidence of Amar’s guilt. On January 25, 1962, he was rehabilitated, and on September 26, 1989, his membership in the MPRP restored.