Simplified: Pokrovsk faces a particularly urgent threat because Russia has kept up relentless attacks across the front Ukrainian soldiers and commanders said
Simplified: Ukraine's losses are tracked on whiteboards with code names tallies of drones lost electronic warfare systems destroyed soldiers killed or wounded
Simplified: Front lines are not sprawling trenches but small defensive positions much of the fighting is done by drones and artillery according to Mr Kofman
Simplified: Months of persistent attacks by Russia near Sumy have yielded minimal gains Ukrainians have pushed troops back according to military analysts