Russia has suffered as many as 450,000 deaths and 1.4 million total casualties since launching its full-scale invasion of Ukraine, the highest battlefield death toll suffered by any major power since World War II, according to a new analysis.
Overall, there have been more than 2 million casualties on both sides since Russia’s February 2022 invasion of Ukraine, the Center for Strategic and International Studies, or CSIS, said in a report released Wednesday.
“The number of Russian casualties and fatalities are astonishing,” the report said. “Since World War II, no major power has suffered anywhere near these numbers of casualties or fatalities in any war, leaving Russia with a grim and unparalleled recent historical record.”
From a historical perspective, the United States would have to fight the Vietnam War roughly eight times to match Russia’s battlefield death tally in Ukraine.
Russian battlefield casualties and fatalities have been significantly higher than those on the Ukrainian side throughout the fighting, with Ukraine suffering roughly 600,000 casualties overall. But the ratio has increasingly shifted in Ukraine’s favor. For most of the war, the Russia-Ukraine casualty ratio was between 2:1 and 3:1, but that rate has risen to nearly 8:1 in the first half of 2026, the report said.
Russia’s monthly casualty rate of over 30,000 per month in 2026 now exceeds recruitment rates of roughly 27,000 new troops per month, it added.
The mounting Russian losses come as Ukraine makes gradual territorial gains on the battlefield. Russia’s territorial control of the country shrank by roughly 60 square miles in April and May, the report said.
In addition, Ukraine has developed “a new paradigm for air power” with short-, medium- and long-range strikes against Russian military and economic targets using drones and AI-enabled systems.
One recent development is Ukraine’s fielding of the Hornet, a one-way, autonomous attack drone that costs roughly $6,000 and has a range of up to 93 miles, CSIS said. The weapon was developed in partnership with Ukrainian and U.S. companies and uses AI to analyze live video feeds day and night to identify and strike targets.
The use of such systems is “changing the character of warfare,” CSIS said.
Ukraine has also struck deeper into Russian territory with dramatic attacks inside Moscow and St. Petersburg, with video of incoming drones circulating widely on social media.
“In a stunning acknowledgement of Russia’s struggles in Ukraine, President Vladimir Putin dramatically scaled back his annual military parade in May 2026 because of concerns about Ukrainian long-range strikes and increasing battlefield challenges in Ukraine,” the report said.
In recent weeks, strikes on oil and gas facilities around Moscow have led to shortages of fuel and lines at the gas pump. But despite the difficulties, Putin has not changed his war aims, CSIS said.
“So long as Putin remains willing to pay the steep price, Russia can continue to tap into a deep manpower pool and a war economy that, while strained, has not yet buckled,” the report said.
At the same time, Ukraine also shows no sign of collapsing even after years of relentless Russian strikes.
But given the nature of the fighting, defending terrain already held is easier than retaking territory, the report noted. That poses a challenge for Ukraine when it comes to taking back what Russia has already seized since 2014, when Crimea was annexed and other parts of eastern Ukraine came under Russian control.
“Ukraine’s best hope may be a stalemate that leads to a peace agreement or ceasefire,” the report said.
The goal for Europe and the United States should be to increase the cost to Russia with more military and economic support for Ukraine, CSIS said.
“The bitter irony of the Ukraine war is that despite Russia’s battlefield challenges and economic vulnerabilities, the United States and Europe have failed to fully wield economic or military pressure,” the report said. “Without greater costs in blood and treasure, Putin is likely to keep fighting — even as he pushes his country toward an economic, political, and military abyss.”
