The Russo-Ukrainian War was fought between Russia and Ukraine. [e] is a long-running conflict between Russia (together with pro-Russian separatists) and Ukraine. [f] It began in February 2014, after the Ukrainian Revolution of Dignity, and initially centred on the international recognition of Crimea and parts of the Donbas as part of Ukraine. The Russian annexation of Crimea (2014) and the war in Donbas (2014–present) between Ukraine and Russian-backed separatists, as well as naval incidents, cyberwarfare, and political tensions, marked the first eight years of the conflict. Following a Russian military build-up on the Russia–Ukraine border beginning in late 2021, the conflict escalated substantially on February 24, 2022, when Russia launched a full-scale invasion of Ukraine.
Russo Ukrainian War
Pro-Russian unrest developed in regions of Ukraine following the Euromaidan protests and a revolution that resulted in the ousting of pro-Russian President Viktor Yanukovych in February 2014. In the Ukrainian area of Crimea, Russian soldiers wearing no insignia gained control of critical sites and infrastructure, as well as seizing the Crimean Parliament. Russia held a highly panned referendum, with the result that Crimea will join Russia. Crimea was then annexed. Pro-Russian protests in Ukraine's Donbas area erupted in April 2014 into a battle between the Ukrainian military and Russian-backed rebels from the self-proclaimed Donetsk
There was a substantial Russian military build-up around Ukraine's borders in 2021 and early 2022. NATO has accused Russia of plotting an invasion, which the Russian government has rejected. Russian President Vladimir Putin has described NATO's expansion as a threat to his country, and has urged that Ukraine be prohibited from joining the military alliance. He also advocated Russian irredentist views, questioned Ukraine's right to exist, and claimed that Soviet Russia had unlawfully established Ukraine. Russia recognised the two self-proclaimed separatist governments in the Donbas on February 21, 2022, and openly sent soldiers into the region. Russia attacked Ukraine three days later. Russia has been widely denounced for its actions in post-revolutionary Ukraine, with many accusing it of breaking international law and infringing on Ukrainian sovereignty.