Question: In which capacity did this person, who established the Bogd Khan puppet government, serve in the Russian Civil War?

Context paragraphs:
Russian Civil War: The Russian Civil War (Russian: Гражда́нская война́ в Росси́и , "Grazhdanskaya voyna v Rossiyi" ; November 1917 – October 1922) was a multi-party war in the former Russian Empire immediately after the Russian Revolutions of 1917, as many factions vied to determine Russia's political future.  The two largest combatant groups were the Red Army, fighting for the Bolshevik form of socialism led by Vladimir Lenin, and the loosely allied forces known as the White Army, which included diverse interests favoring monarchism, capitalism and alternative forms of socialism, each with democratic and antidemocratic variants.  In addition, rival militant socialists and nonideological Green armies fought against both the Bolsheviks and the Whites.  Eight foreign nations intervened against the Red Army, notably the Allied Forces and the pro-German armies.  The Red Army defeated the White Armed Forces of South Russia in Ukraine and the army led by Admiral Aleksandr Kolchak in Siberia in 1919.  The remains of the White forces commanded by Pyotr Nikolayevich Wrangel were beaten in Crimea and evacuated in late 1920.  Lesser battles of the war continued on the periphery for two more years, and minor skirmishes with the remnants of the White forces in the Far East continued well into 1923.  The war ended in 1923 in the sense that Red control of the newly formed Soviet Union was now assured, although armed national resistance in Central Asia was not completely crushed until 1934.  There were an estimated 7,000,000–12,000,000 casualties during the war, mostly civilians.  The Russian Civil War has been described by some as the greatest national catastrophe that Europe had yet seen.

Roman von Ungern-Sternberg: Baron Roman Nicolaus Maximilian von Ungern-Sternberg (Russian: Барон Ро́берт-Ни́колай-Максими́лиан Рома́н Фёдорович фон У́нгерн-Ште́рнберг ) (10 January 1886 NS – 15 September 1921) was an anti-Bolshevik lieutenant general in the Russian Civil War and then an independent warlord whose Asiatic Cavalry Division wrested control of Mongolia from the Republic of China in 1921 after its occupation.  He was often referred to as Baron Ungern, or simply Ungern.

Da Lam Tserenchimed: Da Lam Tserenchimed (Mongolian: Да лам Цэрэнчимэд , Standard Tibetan: ཏཱ་བླ་མ་ཚེ་རིང་འཆི་མེད། ; 1869 – 1914) was a prominent lama and early 20th century Mongolian independence leader.  In December 1911 he was appointed interior minister and "de facto" prime minister in the Bogd Khan's first government of Autonomous Mongolia, a position he held until Tögs-Ochiryn Namnansüren officially became the first prime minister in July 1912.

1st Cossack Volunteer Cavalry Regiment: The 1st Cossack Volunteer Cavalry Regiment was a volunteer of Don Cossack cavalry regiment that served in the Don Army during the Russian Civil War.  The unit was formed in March - April 1918 by Colonel Alexei V. Kravtzov to serve with the forces of Don Army in the opening stages of Russian Civil War.  Included to the Army Corps of Gen. Tatarkin on May 19.

Bogd Khan: The Bogd Khan (Mongolian: Богд Живзундамба Агваанлувсанчойжинямданзанванчүг, "Bogd Jivzundamba Agvaanluvsanchoijinyamdanzanvanchüg" ; 1869–1924) was enthroned as Khagan of Mongolia (Bogd Khaganate) on 29 December 1911, when Outer Mongolia declared independence from the Qing dynasty after the Xinhai Revolution.  He was born in Tibet.  As the 8th Jebtsundamba Khutuktu, he was the third most important person in the Tibetan Buddhism hierarchy, below only the Dalai and Panchen Lamas, and therefore also known as the "Bogdo Lama".  He was the spiritual leader of Outer Mongolia's Tibetan Buddhism.  His wife Tsendiin Dondogdulam, the Ekh Dagina ("Dakini Mother"), was believed to be a manifestation of White Tara.

Green armies: The Green armies, Green Army (Russian: "Зелёная Армия"), or Greens (Russian: "Зелёные") were armed peasant groups which fought against all governments in the Russian Civil War of 1917–22.  They fought to protect their communities from requisitions or reprisals carried out by third parties.  At times associated with the Socialist-Revolutionary Party (by far the largest grouping of the Russian Constituent Assembly elected in 1917), the Green Armies had at least tacit support throughout much of Russia.  However, the Green Armies' primary base, the peasantry, were largely reluctant to wage an active campaign during the Russian Civil War.  Its strength during the civil war has been measured at 40,000 men.

Mikhail Alekseyev: Mikhail Vasiliyevich Alekseyev (Russian: Михаил Васильевич Алексеев ) (3 November 1857 – 25 September 1918) was an Imperial Russian Army general during World War I and the Russian Civil War.  Between 1915 and 1917 he served as Tsar Nicholas II's Chief of Staff of the Stavka, and after the February Revolution, was its commander-in-chief under the Russian Provisional Government from March to May 1917.  He later played a principal role in founding the Volunteer Army in the Russian Civil War and died in 1918 of heart failure while fighting the Bolsheviks in the Volga region.

Roman Ivanovich Panin: Roman Ivanovich Panin (Russian: Роман Иванович Панин ; 28 September 1897 – 1 June 1949) was a Soviet major general from during World War II.  An Imperial Russian Army junior officer in World War I, he joined the Red Army in 1919.  Panin fought in the Russian Civil War and continued to serve after the end of the Russian Civil War.  He was an advisor to the National Revolutionary Army between 1938 and 1939.  Later he participated in the Soviet-Finnish war as a corps commander, and during World War II as the commander of the 14th Army, commanding the defense of Murmansk during Operation Silver Fox.  Panin became commander of the 2nd Reserve Army in May 1942 and two months later became a lecturer at the Frunze Military Academy.  In February 1943 he became Volkhov Front chief of combat training and in September led the 7th Rifle Corps.  After participating in the Leningrad–Novgorod Offensive, Panin briefly led the 99th Rifle Corps.  In July 1944, Panin became deputy commander of the 5th Army.  Hospitalized in February 1945 during the East Prussian Offensive, Panin did not see further action.  After recovering he became an instructor at the Frunze Military Academy and retired in 1949.  He died shortly afterwards.

Manjusri Monastery: Manjusri Monastery (Mongolian: Манзушри Хийд, "Manzushir Khiid" ; alternately translated as Manzushir) is a former Buddhist monastery established in 1733 and destroyed by Mongolian communists in 1937.  Its ruins are located approximately 15 kilometers (as the crow flies, 43 kilometers by car) south of the Mongolian capital Ulaanbaatar on the south slope of Bogd Khan Uul mountain.

Jalkhanz Khutagt Sodnomyn Damdinbazar: The Jalkhanz Khutagt Sodnomyn Damdinbazar (Mongolian: Жалханз Хутагт Содномын Дамдинбазар ; 1874–1923) was a high Buddhist incarnation from northwestern Mongolia who played a prominent role in the country's independence movement in 1911-1912.  He served as Prime Minister twice; first in 1921 as part of the Bogd Khan puppet government established by Roman von Ungern-Sternberg, and again from 1922 to 1923 under the revolutionary government of the Mongolian People's Party.

Supporting paragraphs: Jalkhanz Khutagt Sodnomyn Damdinbazar Roman von Ungern-Sternberg
Answer: anti-Bolshevik lieutenant general