Ukraine’s struggle to hold its territory traces directly to a sequence of events that began more than a decade ago. After the Soviet Union dissolved in 1991, Ukraine emerged as an independent state from the Ukrainian Soviet Socialist Republic, which had been a constituent republic since 1922. The country’s independence followed decades of centralized Soviet rule and a violent famine that killed millions.
The territory now called Ukraine had long been a crossroads: home to early Slavic expansion and the medieval state of Kievan Rus’, a major East Slavic cultural centre before its collapse after the Mongol invasions. For centuries the land was split among external powers such as Lithuania, Poland, the Ottoman Empire, and Russia.
The post-Cold War borders that defined modern Ukraine held for more than two decades. Then, in 2014, the Euromaidan demonstrations ended in revolution. That political upheaval coincided with Russia’s seizure of Crimea, the first unilateral annexation of Ukrainian land in the post-Soviet period.
That sequence set the stage for later occupation of eastern regions and a full-scale invasion. Today’s territorial losses trace back to that long contest over Ukrainian sovereignty and a sudden break in the post-Cold War order.
From Crimea to the Donbas: The First Phase
In February and March 2014, Moscow moved on the Crimean Peninsula, a roughly 27,000-square-kilometer territory that was home to about 2.4 million people before the annexation. On March 16, a disputed referendum was held, condemned as illegal by Ukraine and most Western nations.
Russia then declared the peninsula its own territory. Within weeks, the same playbook repeated in eastern Ukraine. In April 2014, Russian-backed separatists seized control of parts of the Donetsk and Luhansk oblasts, the region collectively known as the Donbas, covering about 16,000 square kilometers.
By the time of the full-scale invasion on February 24, 2022, Russia controlled roughly 7 percent of Ukrainian territory: Crimea plus those Donbas enclaves. That was only the opening position.
The 2022 Invasion and Its Aftermath
The full-scale invasion redrew the map entirely. As of June 2023, the Ukrainian government estimates that Russia occupies approximately 18 percent of Ukraine’s territory.
The total area under Russian control is about 108,000 square kilometers. That figure includes Crimea, most of the Donetsk and Luhansk oblasts, and additional territory in the Zaporizhzhia and Kherson oblasts seized after February 2022. The front line as of mid-2023 stretches approximately 1,000 kilometers, from the north of Kharkiv to the south of Kherson. In September 2022, Russia claimed the annexation of four Ukrainian oblasts — Donetsk, Luhansk, Zaporizhzhia, and Kherson — after referendums widely condemned as shams.
The diplomatic chorus dismissed them, but on the ground, Moscow treated the claims as binding. Controlling 108,000 square kilometers requires a sprawling occupation apparatus, and the front line’s length — about 1,000 kilometers — imposes its own brutal arithmetic on both sides.
The Donbas alone, about 16,000 square kilometers, has been a grinding, attritional battlefield since 2014. The additional territory seized after February 2022 in Zaporizhzhia and Kherson adds another layer of complexity.
Ukraine’s Counteroffensives and the Future Front
Ukraine has not been static. In September 2022, it recaptured about 6,000 square kilometers in the Kharkiv region.
In November 2022, it retook the city of Kherson, which had a pre-war population of roughly 280,000. Those gains are significant but partial. The territory still under occupation dwarfs what has been recovered.
The pattern is clear: Russia’s strategy relies on seizing land, consolidating control through disputed referendums, and then treating the occupation as irreversible. Ukraine’s counteroffensives have shown that momentum can shift, but the scale of the challenge is immense.
What to watch next is whether Ukraine can sustain the kind of counteroffensive operations that yielded the Kharkiv and Kherson gains, or whether the front line — that 1,000-kilometer arc — will settle into a frozen conflict. The numbers on the map are not static; they are the product of political will, military capacity, and the willingness of both sides to absorb losses. The arithmetic of occupation is, in the end, a ledger of power.
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