Olena Bilozerska, 42, credited with at least 10 confirmed ‘kills’ in the trenches of Donbas, told MailOnline she would be at the front lines again within hours to face the Russians. And this chilling video posted online of her picking off her targets through a thermal imaging night sight in 2017 shows the ruthless efficiency of her deadly craft. On the soundtrack, as a bird flutters above the silent enemy trench 200m away, she is surprised to see two men crawling out of their position. ‘It was the night of Ukrainian Independence Day anniversary in August 2017,’ she recalled, ‘and these Cossacks must have assumed we were lying drunk in our trenches celebrating.