Tajikistan harkens to the Samanid Empire (819–999). The Tajik people came under Russian rule in the 1860s. The Basmachi revolt broke out in the wake of the Russian Revolution of 1917 and was quelled in the early 1920s during the Russian Civil War. In 1924, Tajikistan became an Autonomous Soviet Socialist Republic of the Soviet Union, the Tajik ASSR, within Uzbekistan. In 1929, Tajikistan was made one of the component republics of the Soviet Union – Tajik Soviet Socialist Republic – and it kept that status until gaining independence 1991 after the dissolution of the Soviet Union.
The Soviet–Afghan War was a protracted armed conflict fought in the Soviet-controlled Democratic Republic of Afghanistan (DRA) from 1979 to 1989. The war was a major conflict of the Cold War as it saw extensive fighting between the DRA, the Soviet Union and allied paramilitary groups against the Afghan mujahideen and their allied foreign fighters. While the mujahideen were backed by various countries and organizations, the majority of their support came from Pakistan, the United States, the United Kingdom, China, Iran, and the Arab states of the Persian Gulf. The involvement of the foreign powers made the war a proxy war between the United States and the Soviet Union. Combat took place throughout the 1980s, mostly in the Afghan countryside. The war resulted in the deaths of approximately 3,000,000 Afghans, while millions more fled from the country as refugees; most externally displaced Afghans sought refuge in Pakistan and in Iran. Approximately 6.5% to 11.5% of Afghanistan's erstwhile population of 13.5 million people is estimated to have been killed over the course of the conflict. The Soviet–Afghan War caused grave destruction throughout Afghanistan and has also been cited by scholars as a significant factor that contributed to the dissolution of the Soviet Union, formally ending the Cold War.
The ten years 1917–1927 saw a radical transformation of the Russian Empire into a socialist state, the Soviet Union. Soviet Russia covers 1917–1922 and Soviet Union covers the years 1922 to 1991. After the Russian Civil War (1917–1923), the Bolsheviks took control. They were dedicated to a version of Marxism developed by Vladimir Lenin. It promised the workers would rise, destroy capitalism, and create a socialist society under the leadership of the Communist Party of the Soviet Union. The awkward problem, regarding Marxist revolutionary theory, was the small proletariat, in an overwhelmingly peasant society with limited industry and a very small middle class. Following the February Revolution in 1917 that deposed Nicholas II of Russia, a short-lived provisional government gave way to Bolsheviks in the October Revolution. The Bolshevik Party was renamed the Russian Communist Party (RCP).
The Basmachi movement was an uprising against Imperial Russian and Soviet rule in Central Asia by rebel groups inspired by Islamic beliefs.
The Panjdeh Incident was an armed engagement between the Emirate of Afghanistan and the Russian Empire in 1885 that led to a diplomatic crisis between Great Britain and the Russian Empire regarding the Russian expansion south-eastwards towards the Emirate of Afghanistan and the British Raj (India). After nearly completing the Russian conquest of Central Asia, the Russians captured an Afghan border fort, threatening British interests in the area. Seeing this as a threat to India, Britain prepared for war but both sides backed down and the matter was settled diplomatically, with the Russians and Afghans exchanging territories. The incident halted further Russian expansion in Asia, except for the Pamir Mountains, and resulted in the definition of the north-western border of Afghanistan.
Relations between the Soviet Unionand Japan between the Communist takeover in 1917 and the collapse of Communism in 1991 tended to be hostile. Japan had sent troops to counter the Bolshevik presence in Russia's Far East during the Russian Civil War, and both countries had been in opposite camps during World War II and the Cold War. In addition, territorial conflicts over the Kuril Islands and South Sakhalin were a constant source of tension. These, with a number of smaller conflicts, prevented both countries from signing a peace treaty after World War II, and even today matters remain unresolved.
The Soviet Armed Forces, also known as the Armed Forces of the Soviet Union, the Red Army (1918–1946) and the Soviet Army (1946–1991), were the armed forces of the Russian SFSR (1917–1922) and the Soviet Union (1922–1991) from their beginnings in the Russian Civil War of 1917–1923 to the collapse of the USSR in 1991. In May 1992, Russian President Boris Yeltsin issued decrees forming the Russian Armed Forces, which subsumed much of the Soviet Armed Forces. Multiple sections of the former Soviet Armed Forces in the other, smaller Soviet republics gradually came under those republics' control.
The borders of Russia changed through military conquests and by ideological and political unions from the 16th century.
The Sino-Soviet conflict of 1929 was an armed conflict between the Soviet Union and the Chinese warlord Zhang Xueliang of the Republic of China over the Chinese Eastern Railway.
The Armenian-Azerbaijani war (1918–1920) was a conflict that took place in the South Caucasus in regions with a mixed Armenian-Azerbaijani population, broadly encompassing what are now modern-day Azerbaijan and Armenia. It began during the final months of World War I and ended with the establishment of Soviet rule.
The Soviet–Japanese border conflicts, also known as the Soviet-Japanese Border War, the First Soviet-Japanese War, the Russo-Mongolian-Japanese Border Wars or the Soviet-Mongolian-Japanese Border Wars, were a series of minor and major conflicts fought between the Soviet Union, Mongolia and Japan in Northeast Asia from 1932 to 1939.
Relations between Afghanistan and Russia first emerged in the 19th century. At the time they were placed in the context of "The Great Game", Russian–British confrontations over Afghanistan from 1840 to 1907. The Soviet Union was the first country to establish diplomatic relations with Afghanistan following the Third Anglo-Afghan War in 1919. On 28 February 1921, Afghanistan and the Soviet Russia signed a Friendship Treaty. The Soviet Union intervened in Afghanistan against the Basmachi movement in 1929 and 1930.
Urta Tagay is an island in the middle of the river Panj on the border of Afghanistan and Tajikistan in Central Asia. It lies between the towns Farkhor and Yangi Qala. It is administered by Takhar Province, Afghanistan. It was the subject of two border conflicts: one in 1913 and another in 1925.
The Turkestan Front was a front of the Red Army during the Russian Civil War, which was formed on the territory of Turkestan Military District by Order of the Republic of Turkestan on February 23, 1919. It was formed a second time by the directive of the Commander-in-Chief on August 11, 1919 on the territory of Samara, Astrakhan, Orenburg Province and Ural region by renaming the Southern group of armies from the Eastern Front of the RSFSR. Its headquarters were in Samara and by 1920 the Turkestan Front counted some 114,000 soldiers.
The Bukharan People's Soviet Republic was a Soviet state that governed the former Emirate of Bukhara during the years immediately following the Russian Revolution. In 1924, its name was changed to the Bukharan Socialist Soviet Republic. After the redrawing of regional borders, its territory was assigned mostly to the Uzbek SSR and some to the Turkmen SSR.
The Bukharan Revolution refers to the events of 1917–1925, which led to the elimination of the Emirate of Bukhara in 1920, the formation of the Bukharan People's Soviet Republic, the intervention of the Red Army, the mass armed resistance of the population and its suppression, the inclusion of the republic into the Soviet Union on 27 October 1924, as a separate union republic, the elimination of the newly established republic as a result of national delimitation and the formation of the Uzbek SSR, the Turkmen SSR and Tajik ASSR in 1924.
The Urtatagai conflict was a conflict between the Emirate of Afghanistan and the Russian Empire over control of the island of Urtatagai, which took place 1913. It began in November, when Afghan troops were deployed on Urtatagai after it had merged with the Afghan bank, placing it within Afghan territory. Sometime later, the flow of the river once again separated the island, and on an agreement on 13 December at Askhabad, the Afghan leadership agreed to return the island, ending the conflict.
The Emirate of Afghanistan was an unrecognized state ruled by the Saqqawists that existed from January to October 1929. Habibullāh Kalakāni became the state's only emir on 18 January 1929. After the fall of Kalakāni on 13 October 1929, the Emirate ended.
Yakov Arkadievich Melkumov was a Soviet military commander of Armenian origin. He fought in the First World War and the Russian Civil War. He particularly distinguished himself during the Russian Civil War fighting against the Basmachi movement on the Turkestan Front. He is known for commanding the unit that killed the former Ottoman general who had commanded the Basmachi rebels, Enver Pasha, who was one of the main architects of the Armenian genocide.
Shir Muhammad-bek Gazi, also known as Mahmud-Bek also known under the nickname Korshirmat was a prominent figure of the Basmachi Movement in exile since 1923, the first head of the Turkestan Union during the Great Patriotic War with the support of the Abwehr to restore the insurrectionary movement in Turkestan.
Soviet Union 
Kingdom of Afghanistan (1926)