Artem Chekh served in the Ukrainian army in the mid-2010s, on the front line in Donbas. He wrote a book about it. He’d be first in line to be called up in the event of mobilisation. He has a bag of odds and ends left over from his service; most of what he had he gave away to other soldiers. He still has a three-point strap for an automatic rifle, boots and a summer uniform. He’ll go if he has to.