Euromaidan in the context of "Revolution of Dignity"

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.

Viktor Fedorovych Yanukovych (born 9 July 1950) is a former Ukrainian politician who served as the fourth president of Ukraine from 2010 to 2014. He also served as the prime minister of Ukraine several times between 2002 and 2007 and was a member of the Verkhovna Rada (parliament) from 2006 to 2010. Yanukovych was removed from the presidency during the 2014 Revolution of Dignity, which followed months of protests against him. Since then, he has lived in exile in Russia.

Yanukovych was a member of the pro-Russian Party of Regions. Before entering national politics, Yanukovych was the governor of his native Donetsk Oblast from 1997 to 2002. He was simultaneously the chairman of the oblast's legislature from 1999 to 2001. He first ran for president in the 2004 election, where he was declared the winner against Viktor Yushchenko. However, allegations of electoral fraud and voter intimidation caused widespread protests, in what became known as the Orange Revolution. The Ukrainian Supreme Court nullified the election and ordered a rerun, which Yanukovych lost to Yushchenko. Yanukovych ran for president again in 2010, this time beating Yulia Tymoshenko in an election deemed free and fair by international observers.

The Constitution of Ukraine (Ukrainian: Конституція України, romanized: Konstytutsiia Ukrainy, pronounced [konstɪˈtuts⁽ʲ⁾ijɐ ʊkrɐˈjinɪ]) was adopted and ratified at the 5th session of the Verkhovna Rada, the parliament of Ukraine, on 28 June 1996. The constitution was passed with 315 ayes out of 450 votes possible (300 ayes minimum). All other laws and other normative legal acts of Ukraine must conform to the constitution. The right to amend the constitution through a special legislative procedure is vested exclusively in the parliament. The only body that may interpret the constitution and determine whether legislation conforms to it is the Constitutional Court of Ukraine. Since 1996, the public holiday Constitution Day is celebrated on 28 June.

In 2004, amendments were adopted that significantly changed Ukraine's political system; these changes are sometimes referred to as the 2004 Constitution. In 2010, then-President of Ukraine Viktor Yanukovych reverted these changes on the basis of a ruling made by the Constitutional Court of Ukraine. Following the events of Euromaidan (2013–2014), the 2004 amendments were reinstated.

From the end of February 2014, in the aftermath of the Euromaidan and the Revolution of Dignity, which resulted in the ousting of Russian-leaning Ukrainian president Viktor Yanukovych, demonstrations by Russian-backed, pro-Russian, and anti-government groups (as well as pro-government demonstrations) took place in Crimea, Donetsk, Luhansk, Kharkiv and Odesa. The unrest, which was supported by the Russian military and intelligence services, belongs to the early stages of the Russo-Ukrainian war.

During its first phase in February–March 2014, the Ukrainian territory of Crimea was invaded and subsequently annexed by Russia following an internationally unrecognized referendum, with the United Nations General Assembly voting in favor of Ukraine's territorial integrity. Concurrently, protests by anti-Maidan and pro-Russian groups took place across other parts of eastern and southern Ukraine. Local separatists, some directed and financed by the Russian security services, took advantage of the situation and occupied government buildings in Donetsk, Luhansk, and Kharkiv oblasts in early March 2014. The Ukrainian government was able to quickly quell this unrest, and removed the separatists by 10 March.

The National Police of Ukraine (Ukrainian: Націона́льна полі́ція Украї́ни, romanized: Natsionalna politsiia Ukrainy, IPA: [nɐts⁽ʲ⁾ioˈnɑlʲnɐ poˈl⁽ʲ⁾its⁽ʲ⁾ijɐ ʊkrɐˈjinɪ]; abbr. НПУ/NPU [ˌɛnpeˈu]), often simply referred to as the Politsiia (Поліція, 'Police'), is the national, and only, police service of Ukraine. It was formed on 3 July 2015, as part of the post-Euromaidan reforms launched by Ukrainian president Petro Poroshenko, to replace Ukraine's previous national police service, the Militsiya. On 7 November 2015, all the remaining militsiya were labelled "temporary acting" members of the National Police.

The agency is overseen by the Ministry of Internal Affairs.

The second Azarov government (Ukrainian: Другий уряд Миколи Азарова, Druhyi uriad Mykoly Azarova) was the government of Ukraine from 24 December 2012 to 28 January 2014. It was dissolved amidst the Euromaidan protests. The ministers (except Prime Minister Mykola Azarov who was replaced by Deputy Prime Minister Serhiy Arbuzov (ex officio)), continued briefly as a caretaker government. On 27 February 2014 Ukraine's parliament approved a resolution to formally dismiss the government.