Battles & Wars › Modern conflicts › Russia–Ukraine war
Russian annexation of Crimea
February – March 2014· Event· Europe
Well documentedSolid records, physical evidence or scientific consensus.
In early 2014 Russian forces seized Ukraine's Crimean peninsula, and Russia annexed it after a referendum held under military control.
See it on the Battles & Wars map →What happened
In February 2014 the Euromaidan protests in Kyiv ousted pro-Russian President Viktor Yanukovych; Russia called it a coup. Within days, soldiers without insignia, nicknamed 'little green men', seized Crimea's parliament, airports and bases. A referendum on March 16, held under Russian control and boycotted by many Crimean Tatars and Ukrainians, reported 97% support for joining Russia. Russia annexed Crimea on March 18. Putin later admitted the troops were Russian. Crimea hosts Russia's Black Sea Fleet at Sevastopol, and most residents are ethnic Russians.
Why it matters
It was the first forcible annexation of territory in Europe since World War II, brought Western sanctions, and began the war that escalated in 2022.
How we know
UN General Assembly Resolution 68/262 rejecting the referendum, Putin's own admissions, including a 2015 Russian documentary, video of the unmarked troops, and Russia's campaign medal dated from February 20, 2014.
Still debated
Russia calls it the return of historically Russian land by popular vote; Ukraine and most states call it illegal occupation. The referendum's real turnout and result cannot be verified.
Connections (2)
▸Russian annexation of Crimea began Russia–Ukraine warWell documented
The connection
Seizing Crimea broke the post-Cold War principle that European borders would not be changed by force. Weeks later, armed separatists with Russian backing, and later Russian troops, took parts of Donetsk and Luhansk in the Donbas. That conflict, frozen but never settled by the Minsk agreements, set the stage for the 2022 invasion.
When and how
Crimea, February–March 2014; fighting in the Donbas from April 2014; Minsk ceasefire deals of September 2014 and February 2015, the second brokered by France and Germany.
How we know
Ukraine dates the war to February 20, 2014, the start date on Russia's own Crimea campaign medal; OSCE monitors documented Donbas fighting and Russian equipment.
Debates and open questions
Russia denied its troops fought in the Donbas before 2022. How far Moscow directed the separatists, and whether a firmer Western response in 2014 would have deterred 2022, are debated.
▸Russian annexation of Crimea was followed eight years later by Battle of Kyiv (2022)Well documented
The connection
Crimea's swift, almost bloodless seizure in 2014 seemed to show that Ukraine would not fight and the West would respond weakly. Many analysts think this led Moscow to expect another fast win in 2022. Instead Ukraine's army, rebuilt and battle-tested in the Donbas after 2014, held. Crimea also served as a launch pad for Russia's southern advance.
When and how
From Crimea in 2014 to Kyiv's outskirts in February 2022; Ukraine's forces were reformed with Western training in the years between.
How we know
Analyses of Russian planning by RUSI and others, and Western training records, link the two; the claim about Kremlin expectations is an inference.
Debates and open questions
Whether Putin's 2022 decision rested mainly on lessons from 2014 or on other factors, such as his July 2021 essay calling Russians and Ukrainians 'one people', is debated.