"I'm very impressed by its accuracy, and we can use a large range of ammunition. The most important thing is that bringing it into combat is very fast. It is much more effective than the old Soviet equipment I've used," says Kozak. Ukrainian soldiers fire four rounds, each one emitting a deafening sound. From around us, we also hear the sound of incoming shells. The battle rages on. "As you can hear, there is a wave of assaults from the enemy and we need a lot of ammunition to suppress that. We hope our international partners can give us as much ammunition as possible, because if we have to start choosing priority and non-priority targets then the enemy will be successful," says Kozak. We ask the soldiers how they feel about suggestions that Ukraine will have to make concessions, that it might have to give up land to secure peace. "It's painful to hear that. Even I want to go home to my family. My daughter is eight and I miss her so much. But we need to be strong. I don't believe that if we give up some territory, they will stop. In a couple of years, they will return and start over," says Yurii. "A person who has not come here, who hasn't felt the consequences of Russian aggression, those armchair commentators say you can give up land and everything will be over. They will never understand how many brothers and friends we have lost. We shouldn't give up a single metre of our land," says Kozak.