The Russian army made short work of occupying the city

Ukrainian soldiers fought to keep Russian paratroopers off the Antonivka Bridge, which crosses the Dnipro River into the city of Kherson. Serhiy wondered why Ukrainian authorities hadn't blown up the bridge on the first day of the invasion.

"It should have been blown up," he says. "That would have slowed down the Russian troops."

Serhiy got his wife and children out of Kherson. Then, as Russian forces took over his city, he turned to a special mission.

"To destroy the enemy's equipment and enemy troops," he says. "And also to find and kill collaborators."