Barely a kilometre from Russian positions defending the captured eastern city of Izium, Ukrainian and foreign fighters hunker in a dank basement. Artillery rains down on them most nights, shaking loose the plaster and filling the air with dust.
At the sharp end of efforts to stop the Russian army's progress in eastern Ukraine are the Carpathian Sich battalion, a unit of Ukrainians and foreign nationals who answered Kyiv's call for help to confront the invader.
"I respect other nations... I love all people with all kind of colour skin – except Russians. These are our enemies."
(Reporting by Simon Lewis; Additional reporting by Valeriia Dubrovska, Natalie Thomas and Marko Djurica; Photo Editing by Kezia Levitas; Text Editing by Gareth Jones and Jon Boyle; Layout by Eve Watling)