Obviously bolscheviks didn't want that westerners have a foos set on their southern borders..Lol the republic was declared in 1917 by survivors of the genocide and was a land of refuge for many fleeing armenians, what do you mean its not connected to the genocide??
Just gave the wiki article u csn check the sources at least
During the First World War and in the ensuing peace negotiations in Paris, the Allies had vowed to punish the Turks and reward some, if not all, the eastern provinces of the empire to the nascent Armenian republic. But the Allies were more concerned with concluding the peace treaties with Germany and the other European members of the Central Powers. In matters related to the Near East, the principal powers, Great Britain, France, Italy and the United States, had conflicting interests over the spheres of influence they were to assume. While there were crippling internal disputes between the Allies, and the United States was reluctant to accept a mandate over Armenia,
It was not until August 1920 that the Allies drafted the peace settlement of the Near East, in the form of the Treaty of Sèvres. The United States had refused to assume the Armenian mandate in May of that year, but the Allies delegated the US to draw the western boundaries of the republic. The US allotted four of the six eastern provinces to the Ottoman Empire, including an outlet to the Black Sea. The Treaty of Sèvres served to confirm Kemal's suspicions about Allied plans to partition the empire. According to the historian Richard G. Hovannisian, his decision to order the invasion of Armenia was intended to show the Allies that "the treaty would not be accepted and that there would be no peace until the West was ready to offer new terms in keeping with the principles of the Turkish National Pact."
And volià )
In late November 1920, there was a Soviet-backed communist uprising in Armenia. On November 28, 1920, blaming Armenia for the invasions of Şərur (20 November) and Karabakh(21 November), the 11th Red Army under the command of Anatoli Gekker crossed the demarcation line between Armenia and Soviet Azerbaijan. The second Soviet-Armenian war lasted a week. Exhausted by the six years of wars and conflicts, the Armenian army and population were incapable of active resistance.
When the Red Army entered Yerevan on December 4, 1920, the government of Armenian Republic effectively surrendered. On December 5, the Armenian Revolutionary Committee (Revkom, consisting mostly of Armenians from Azerbaijan) also entered the city. Finally, on December 6, the Cheka, Felix Dzerzhinsky's dreaded secret police, entered Yerevan. The Soviets took control and Armenia ceased to exist as an independent state. Soon afterward, the communists declared the Armenian Soviet Socialist Republic.
AND ALL LIVED HAPPY AFTERWARDS LOL ( history explained for dummies )
Convinced that these heavy-handed tactics were the source of the alienation of the native population to Soviet rule, in 1921 Moscow appointed an experienced administrator, Alexander Miasnikian, to carry out a more moderate policy and one better attuned to Armenian sensibilities. With the introduction of the New Economic Policy (NEP), Armenians began to enjoy a period of relative stability. Life under the Soviet rule proved to be a soothing balm in contrast to the turbulent final years of the Ottoman Empire. The Armenians received medicine, food, as well as other provisions from the central government and extensive literacy reforms were carried out. EXCEPT : The situation was difficult for the Armenian Apostolic Church, however, which became a regular target of criticism in educational books and in the media and struggled greatly under Communism.