2014–15 Russian military intervention in Ukraine

2014–15 Russian military intervention in Ukraine
Ministry of Defense of Ukraine · CC BY-SA 2.0 · source
Name	2014–15 Russian military intervention in Ukraine
Caption	Fighting near Donetsk International Airport, 2014
Date	2014–2015
Place	Crimea Peninsula, Donetsk Oblast, Luhansk Oblast, Azov Sea
Result	Annexation of Crimea (2014), establishment of Donetsk People's Republic and Luhansk People's Republic de facto control; ongoing international disputes

2014–15 Russian military intervention in Ukraine was a campaign of operations and support by the Russian Armed Forces that began after the Euromaidan protests and the 2014 Ukrainian revolution. The intervention included covert and overt deployments, the annexation of the Crimea Peninsula and support for separatist movements in the Donbas region, producing large-scale fighting around Donetsk International Airport, Ilovaisk, and along the Donetsk–Luhansk contact line. The intervention reshaped relations between Russia, Ukraine, European Union, NATO and led to major international sanctions and legal disputes.

Background

The intervention followed the overthrow of Viktor Yanukovych after the Euromaidan movement and the installation of an interim provisional government in Kyiv. In this context, Russian President Vladimir Putin cited protection of ethnic Russians and Russian speakers as justification, while Western capitals including United States, Germany, France and United Kingdom warned against violation of Ukrainian sovereignty. Prior events included the 1994 Budapest Memorandum on Security Assurances and longstanding disputes over Black Sea Fleet basing rights at Sevastopol and the Autonomous Republic of Crimea status. The political crisis intersected with the 2013–2014 Ukrainian crisis, the Crimean annexation, and rising pro-Russian separatism in Donetsk Oblast and Luhansk Oblast.

Timeline of military involvement

Early operations began in February–March 2014 with unmarked personnel later identified as Russian Naval Infantry and Spetsnaz GRU seizing key installations in Simferopol and Sevastopol. By April 2014, pro-Russian protesters and paramilitary units seized administrative buildings in Donetsk and Luhansk, and armed convoys crossed the Russia–Ukraine border; incidents such as the Battle of Sloviansk and the Siege of Luhansk Airport escalated combat. Major engagements in 2014–2015 included the Second Battle of Donetsk Airport, the Ilovaisk crisis, the Debaltseve offensive and skirmishes around Mariupol and the Azov Sea coast. The signing of the Minsk Protocol (September 2014) and Minsk II (February 2015) involved President Petro Poroshenko, President François Hollande, Chancellor Angela Merkel and President Vladimir Putin aiming to halt fighting, but violations continued with artillery duels, drone use, and sniper incidents across the contact line.

Forces and matériel

Russian forces deployed a mix of regular units, private military contractors, pro-Russian militia formations and intelligence operatives from the GRU and Federal Security Service (FSB). Equipment documented in the theatre included T-72 and T-90 tanks, BMP-2 and BTR armored personnel carriers, BM-21 Grad multiple rocket launchers, 9K33 Osa air-defence systems, S-300 missile systems, and rotary-wing aircraft such as the Mil Mi-24 and fixed-wing transport like the Ilyushin Il-76. Ukrainian forces, including the Ukrainian Ground Forces, National Guard of Ukraine and volunteer units such as Azov (volunteer regiment), used Soviet-era matériel, western-supplied anti-tank weapons like the FGM-148 Javelin (later deliveries), and improvised fortifications. Reports documented logistics via rail and road convoys, coordinated artillery fire, electronic warfare tools and use of unmarked vehicles often described as ""little green men"" in contemporary accounts.

International response and sanctions

International reaction involved coordinated measures by European Union, United States and partners including Canada, Australia and Japan, imposing sanctions on Russian banks, energy companies, defence firms and individuals such as Sergei Ivanov-era figures and businesspeople. Sanctions targeted entities like Sberbank, Gazprombank, Rostec and officials linked to annexation planning, and restricted access to capital markets, technology transfer for oil exploration and defence exports. Diplomatic measures included suspension of Russia from the G8 (restoring the G7 format), visa bans and asset freezes. Concurrently, NATO increased air policing and force posture in Poland, Baltic states and Romania; OSCE monitors deployed the Special Monitoring Mission to Ukraine, and legal disputes were brought before the International Court of Justice and arbitration forums.

Humanitarian impact and casualties

Fighting and the annexation produced large-scale displacement, infrastructure damage, and civilian casualties in Donetsk and Luhansk, and a humanitarian crisis affecting access to healthcare and utilities in winter months. The United Nations Office for the Coordination of Humanitarian Affairs and International Committee of the Red Cross documented internally displaced persons moving to Kharkiv, Dnipro region and Zaporizhzhia. Casualty estimates vary: combatant and civilian deaths numbered in the thousands, with many injured and missing; widespread damage included destroyed apartment blocks, industrial sites and the contested Donetsk International Airport terminal. Mines and unexploded ordnance further hindered relief operations and post-conflict recovery.

Legal status and investigations

The intervention raised questions under the United Nations Charter and the Helsinki Final Act regarding territorial integrity and use of force. Ukraine brought cases to the International Court of Justice alleging violations of treaties and human rights instruments, while the European Court of Human Rights received multiple claims against Russia for actions in Crimea and Donbas. Independent investigations by organizations such as Amnesty International and Human Rights Watch examined allegations of war crimes, enforced disappearances and unlawful detentions; investigative journalism groups like Bellingcat published open-source analyses of troop movements and matériel provenance. Ongoing debates concern state responsibility, immunity, and enforcement of judgments amid frozen diplomatic relations.

Category:2014 in Ukraine Category:2015 in Ukraine Category:Military interventions involving Russia