 Complete the following phrase:  From the end of February 2014, demonstrations by pro-Russian and anti-government groups took place in major cities across the eastern and southern regions of Ukraine, in the aftermath of the Euromaidan movement and the 2014 Ukrainian revolution. During the first stage of the unrest, known as the Russian Spring , the Ukrainian territory of Crimea was annexed by the Russian Federation after a Russian military intervention, and an internationally criticized a hrefUnited20Nations20General20Assembly20Resolution2068262based on UN resolution 68262a Crimean 