Viktor Yanukovych in the context of "Constitution of Ukraine"

On 27 February 2014, unmarked Russian soldiers were deployed to the Crimean Peninsula in order to wrest control of it from Ukraine, starting the Russo-Ukrainian War. This military occupation, which the Ukrainian government considers to have begun on 20 February laid the foundation for the Russian annexation of Crimea on 18 March 2014. Under Russia, the Ukrainian Autonomous Republic of Crimea was replaced by the Republic of Crimea, though the legitimacy of the latter is scarcely recognized internationally.

The occupation began during Ukraine's Revolution of Dignity, which ousted pro-Russian president Viktor Yanukovych. Russian special forces without insignia took control of Crimea's government buildings, surrounded Ukrainian military bases, and blockaded the peninsula. A pro-Russian government was installed and a referendum on Crimea's status was held under occupation. According to the Russian-installed authorities, the result was in favour of joining Russia. It annexed Crimea on 18 March 2014, re-organizing it as a Russian republic and turning Sevastopol into a Russian federal city.

In February and March 2014, Russia invaded the Crimean Peninsula, part of Ukraine, and then annexed it. This took place in the relative power vacuum immediately following the Revolution of Dignity. It marked the beginning of the Russo-Ukrainian War.

The events in Kyiv that ousted Ukrainian president Viktor Yanukovych on 22 February 2014 sparked both pro-Russian and anti-separatism demonstrations in Crimea. At the same time, Russian president Vladimir Putin told his security chiefs to begin work on "returning Crimea to Russia". On 27 February, Russian special forces without insignia seized strategic sites across Crimea. Russia at first denied involvement, but Putin later admitted that they were Russian troops. As the armed men occupied Crimea's parliament, it dismissed the Crimean government, installed the pro-Russian Aksyonov government, and announced a referendum on Crimea's status. The referendum was held under Russian occupation and, according to the Russian-installed authorities, the result was overwhelmingly in favor of joining Russia. The next day, 17 March 2014, Crimea's authorities declared independence and requested to join Russia. Russia formally incorporated Crimea on 18 March 2014 as the Republic of Crimea and federal city of Sevastopol. Following the annexation, Russia militarized the peninsula and warned against any outside intervention.

The Russo-Ukrainian war began in February 2014 and is ongoing. Following Ukraine's Revolution of Dignity, Russia occupied Crimea and annexed it from Ukraine. It then supported Russian paramilitaries who started a war in the eastern Donbas region against Ukraine's military. In 2018, Ukraine declared the region to be occupied by Russia. The first eight years of conflict also involved naval incidents and cyberwarfare. In February 2022, Russia launched a full-scale invasion of Ukraine and began occupying more of the country, starting the current phase of the war, the biggest conflict in Europe since World War II. The war has resulted in a refugee crisis and hundreds of thousands of deaths.

In early 2014, the Euromaidan protests led to the Revolution of Dignity and the ousting of Ukraine's pro-Russian president Viktor Yanukovych. Shortly after, pro-Russian protests began in parts of southeastern Ukraine, while unmarked Russian troops occupied Crimea. Russia soon annexed Crimea after a highly disputed referendum. In April 2014, Russian-backed militants seized towns and cities in Ukraine's eastern Donbas region and proclaimed the Donetsk People's Republic (DPR) and the Luhansk People's Republic (LPR) as independent states, starting the Donbas war. Russia covertly supported the separatists with its own troops, tanks and artillery, preventing Ukraine from fully retaking the territory. The International Criminal Court (ICC) judged that the war was both a national and international armed conflict involving Russia, and the European Court of Human Rights judged that Russia controlled the DPR and LPR from 2014 onward. In February 2015, Russia and Ukraine signed the Minsk II agreements, but they were never fully implemented in the following years. The Donbas war became a static conflict likened to trench warfare; ceasefires were repeatedly broken but the frontlines did not move.

In February and March 2014, Russia invaded the Crimean Peninsula, part of Ukraine, and then annexed it. This took place in the relative power vacuum immediately following the Revolution of Dignity. It marked the beginning of the Russo-Ukrainian war.

The events in Kyiv that ousted Ukrainian president Viktor Yanukovych on 22 February 2014 sparked both pro-Russian and anti-separatism demonstrations in Crimea. At the same time, Russian president Vladimir Putin told his security chiefs to begin work on "returning Crimea to Russia". On 27 February, Russian special forces without insignia seized strategic sites across Crimea. Russia at first denied involvement, but Putin later admitted that they were Russian troops. As the armed men occupied Crimea's parliament, it dismissed the Crimean government, installed the pro-Russian Aksyonov government, and announced a referendum on Crimea's status. The referendum was held under Russian occupation and, according to the Russian-installed authorities, the result was overwhelmingly in favor of joining Russia. The next day, 17 March 2014, Crimea's authorities declared independence and requested to join Russia. Russia formally incorporated Crimea on 18 March 2014 as the Republic of Crimea and federal city of Sevastopol. Following the annexation, Russia militarized the peninsula and warned against any outside intervention.

The Revolution of Dignity (Ukrainian: Революція гідності, romanized: Revoliutsiia hidnosti), also known as the Maidan Revolution or the Ukrainian Revolution, took place in Ukraine in February 2014 at the end of the Euromaidan protests. Scores of protesters were killed by government forces during clashes in the capital Kyiv. Parliament then voted to remove President Viktor Yanukovych, return to the 2004 Constitution of Ukraine, and call new elections. The revolution prompted Russia to occupy Crimea, starting the Russo-Ukrainian War.

In November 2013, a wave of large-scale protests known as "Euromaidan" began in response to President Yanukovych's sudden decision not to sign a political association and free trade agreement with the European Union (EU), instead choosing closer ties to Russia. Euromaidan soon developed into the largest democratic mass movement in Europe since 1989. The Verkhovna Rada (Ukrainian parliament) had overwhelmingly approved finalizing the EU association agreement; Russia had pressured Ukraine to reject it. The scope of the protests widened, with calls for the resignation of Yanukovych and the Azarov government. Protesters opposed what they saw as widespread government corruption and abuse of power, the influence of Russia and oligarchs, police brutality, human rights violations, and repressive anti-protest laws.

Euromaidan (/ˌjʊərəmaɪˈdɑːn, ˌjʊəroʊ-/; Ukrainian: Євромайдан, romanized: Yevromaidan, IPA: [ˌjɛu̯romɐjˈdɑn], lit. 'Euro Square'), or the Maidan Uprising, was a wave of demonstrations and civil unrest in Ukraine, which began on 21 November 2013 with large protests in Maidan Nezalezhnosti (Independence Square) in Kyiv. The protests were sparked by President Viktor Yanukovych's sudden decision not to sign the European Union–Ukraine Association Agreement, instead choosing closer ties to Russia and the Eurasian Economic Union. Ukraine's parliament had overwhelmingly approved of finalizing the Agreement with the EU, but Russia had put pressure on Ukraine to reject it. The scope of the protests widened, with calls for the resignation of Yanukovych and the Azarov government. Protesters opposed what they saw as widespread government corruption, abuse of power, human rights violations, and the influence of oligarchs. Transparency International named Yanukovych as the top example of corruption in the world. The violent dispersal of protesters on 30 November caused further anger. Euromaidan was the largest democratic mass movement in Europe since 1989 and led to the 2014 Revolution of Dignity.

During the uprising, Independence Square (Maidan) in Kyiv was a huge protest camp occupied by thousands of protesters and protected by makeshift barricades. It had kitchens, first aid posts and broadcasting facilities, as well as stages for speeches, lectures, debates and performances. It was guarded by 'Maidan Self-Defense' units made up of volunteers in improvised uniform and helmets, carrying shields and armed with sticks, stones and petrol bombs. Protests were also held in many other parts of Ukraine. In Kyiv, there were clashes with police on 1 December; and police assaulted the camp on 11 December. Protests increased from mid-January, in response to the government introducing draconian anti-protest laws. There were deadly clashes on Hrushevsky Street on 19–22 January. Protesters then occupied government buildings in many regions of Ukraine. The uprising climaxed on 18–20 February, when fierce fighting in Kyiv between Maidan activists and police resulted in the deaths of almost 100 protesters and 13 police.