Question: When was the ukraine taken over by russia?

Disambiguated questions and answers:
context: The modern bilateral relationship between Russia and Ukraine formally started during the World War I as the former Russian Empire was going through its political reform. In 1920 the bilateral relationship between two countries was changed as Ukraine was conquered by the Russian Red Army. In 1990s immediately upon the dissolution of the Soviet Union, of which both Soviet Russia and Soviet Ukraine had been formally founding constituent republics, bilateral relations were revived.
question: When was the ukraine taken over by the Russian Red Army?
short_answers: 1920
wikipage: Russia–Ukraine relations
context: No context provided
question: When was the ukraine's Crimean parliamentary building taken over by unmarked armed men?
short_answers: 27 February 2014
context: During the February–March 2014 Crimean crisis Ukraine lost control of its government buildings, airports and military bases in Crimea to unmarked soldiers and local pro-Russian militias. This started on 27 February when unmarked armed men seized the Crimean parliamentary building. The same day the Crimean parliament replaced the local government with one who wanted Crimean unification with Russia. This government organized the 2014 Crimean status referendum on 14 March 2014 in which the voters voted overwhelmingly to join Russia. On 17 March 2014, Crimea declared its independence. On 18 March 2014, a treaty on incorporating Crimea and Sevastopol into Russia was signed in Moscow and in five days the "Constitutional Law on admitting to the Russian Federation the Republic of Crimea and establishing within the Russian Federation the New Constituent Entities the Republic of Crimea and the City of Federal Importance Sevastopol" was quickly pushed through the Russian parliament, signed by the Russian President and entered into force.<ref name="politics/11209502"></ref> On 19 March 2014 all Armed Forces of Ukraine are withdrawn from Crimea. On 17 April 2014, President Putin stated that the Russian military had backed Crimean separatist militias, stating that Russia's intervention was necessary "to ensure proper conditions for the people of Crimea to be able to freely express their will".
question: When was the ukraine's Crimea and Sevastopol taken over by russia with a treaty?
short_answers: 18 March 2014
wikipage: Russia–Ukraine relations
context: Throughout March and April 2014, pro-Russian unrest spread in Ukraine, with pro-Russian groups proclaiming "People's Republics" in the oblasts of Donetsk and Luhansk, both partially outside the control of the Ukrainian government.
question: When was the ukraine's oblasts of Donetsk and Luhansk taken over by pro-Russian groups?
short_answers: March and April 2014
Throughout March and April 2014
wikipage: Russia–Ukraine relations

Long-form answers:
knowledge: content: Currently, the two countries are engaged in the Russo-Ukrainian War which started in 2014 following Russian annexation of Crimea from Ukraine.
wikipage: Russia–Ukraine relations
long_answer: The modern bilateral relationship between Russia and Ukraine formally started during the World War I as the former Russian Empire was going through its political reform. In 1920 the bilateral relationship between two countries was changed as Ukraine was conquered by the Russian Red Army. Currently, the two countries are engaged in the Russo-Ukrainian War which started in 2014 following Russian annexation of Crimea from Ukraine. During the 2014 Crimean crisis Ukraine lost control of its government buildings, airports and military bases in Crimea to unmarked soldiers and local pro-Russian militias. This started on 27 February 2014 when unmarked armed men seized the Crimean parliamentary building. On 18 March 2014, a treaty on incorporating Crimea and Sevastopol into Russia was signed in Moscow. Throughout March and April 2014, pro-Russian unrest spread in Ukraine, with pro-Russian groups proclaiming "People's Republics" in the oblasts of Donetsk and Luhansk, both partially outside the control of the Ukrainian government.