The Russo-Ukrainian War is an ongoing war, primarily involving Russia, Belarus and pro-Russian forces on one side, and Ukraine on the other. Armed conflict began in February 2014 in the wake of Euro maidan, centred on the status of Crimea and the parts of Donbas which are internationally recognized as part of Ukraine. The conflict had included the Russian annexation of Crimea(2014) the Donbas war(2014- present) naval incidents, cyberwarfare, and political tensions. After Russia military build-ups near Ukraine's borders in 2021, Russia launched a large scale invasion of Ukraine on 24th February 2022. Following the Euro maidan protests and the subsequent removal of Ukrainian President Viktor Yanukovych on 22 February 2014, and amidst pro - Russian unrest in Ukraine, Russian soldiers without insignias took control of strategic positions and infrastructure within the Ukrainian territory of Crimea. On 1 March 2014, the Federation Council of the Russian Federation unanimously adopted a resolution to petition Russian President Vladimir Putin to use military force in Ukraine. The resolution was adopted several days later, after the start of the Russian military operation on the "Returning of Crimea". Russia then annexed Crimea after a widely criticized local referendum which was organized by Russia after the capturing of the Crimean Parliament, whose outcome was for the Autonomous republic of Crimea to join the Russian Federation. In April, demonstrations by pro-Russian groups in the Donbas area of Ukraine escalated into a war between the Ukrainian government and the Russian-backed separatist forces of the self-declared Donestk and Luhansk People republics. In August, Russian military vehicles crossed the border in numerous locations of Donetsk Oblast. The incursion by the Russian military was seen as responsible for the defeat of Ukrainian forces in early September.