Russo-Ukrainian war in the context of "2022 Russian invasion of Ukraine"

The war in Donbas, or the Donbas war, was a phase of the Russo-Ukrainian war in the eastern Donbas region of Ukraine. The war began in April 2014, when Russian paramilitaries seized several towns. Ukraine's military launched an operation against them, but failed to fully retake the territory. Covertly, Russia's military were directly involved, and the separatists were largely under Russian control. The war continued until it was subsumed by the full-scale Russian invasion of Ukraine in 2022.

In March 2014, following Ukraine's Revolution of Dignity, Russia occupied Crimea. Anti-revolution and pro-Russian protests began in Ukraine's Donetsk and Luhansk provinces, collectively 'the Donbas'. On 12 April, a commando unit led by Russian citizen Igor 'Strelkov' Girkin seized Sloviansk and other settlements in the Donbas. Separatists declared the Donetsk and Luhansk republics (DPR and LPR) as independent states. Russia covertly supported them with troops and weaponry. It only admitted sending "military specialists", but later acknowledged the separatists as Russian combat veterans. On 15 April, Ukraine began an "Anti-Terrorist Operation" (ATO). By August 2014, Ukraine had re-taken most of its territory. Russia responded by covertly sending troops, tanks and artillery into the Donbas, helping pro-Russian forces regain much of what they had lost. DPR leader Alexander Borodai said 50,000 Russian citizens had fought for the separatists by mid 2015, excluding the regular Russian troops that invaded.

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 Luhansk People's Republic (LPR; Russian: Луга́нская Наро́дная Респу́блика (ЛНР), romanised: Luganskaya Narodnaya Respublika (LNR), IPA: [lʊˈɡanskəjə nɐˈrodnəjə rʲɪˈspublʲɪkə]) is a disputed territory administered as a republic of Russia in the occupied parts of eastern Ukraine's Luhansk Oblast, with its capital in Luhansk. The LPR was proclaimed by Russian-backed paramilitaries in 2014, and it initially operated as a breakaway state until it was annexed by Russia in 2022. The entire territory of LPR is viewed as sovereign territory of Ukraine by nearly all UN member states. It has a population of 2,102,921 (2022 estimate).

Following Ukraine's Revolution of Dignity in 2014, pro-Russian, counter-revolutionary unrest erupted in the eastern part of the country. Russia annexed Crimea from Ukraine, while the armed separatists seized government buildings and proclaimed the Luhansk People's Republic (LPR) and Donetsk People's Republic (DPR) as independent states. This sparked the war in Donbas, part of the wider Russo-Ukrainian war. The LPR and DPR were often described as puppet states of Russia during this conflict. They received no international recognition from United Nations member states before 2022.

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 International Criminal Court investigation in Ukraine or the Situation in Ukraine is an ongoing investigation by the Prosecutor of the International Criminal Court (ICC) into "any past and present allegations of war crimes, crimes against humanity or genocide committed on any part of the territory of Ukraine by any person" during the period starting "from 21 November 2013 onwards", on an "open-ended basis", covering the Revolution of Dignity, the Russo-Ukrainian war including the 2014 annexation of Crimea by Russia, the war in Donbas and the Russian invasion of Ukraine. The ICC prosecutor commenced these investigations on 2 March 2022, after receiving referrals for the situation in Ukraine from 39 ICC State Parties. On 1 January 2025, Ukraine became the 125th member of the International Criminal Court.