Repost: Something to think about, both Russia and the Ukraine can take some serious casualties. The top three countries with the most casualties during WW2 = China, Russia, and Ukraine. Note - broken down by country not USSR, etc/keep in mind all these countries had a much smaller population during WW2.
List of casualties from top 8 countries during WW2:
Country
Tot. Deaths
Military Deaths
Civ. Deaths via Military
Civ. Deaths via Famine/Disease
China
20,000,000
3,750,000
8,191,000
10,000,000
Russia
13,950,000
6,750,000
4,100,000
3,100,000
Ukraine
6,850,000
1,650,000
3,700,000
1,500,000
Poland
6,000,000
240,000
5,820,000
Germany
5,700,000
4,456,000
2,135,000
Japan
3,100,000
2,300,000
800,000
India
3,087,000
87,000
3,000,000
Belarus
2,290,000
620,000
1,360,000
310,000
Complete list: World War II Casualties by Country 2022 (worldpopulationreview.com)