Ukraine-Russia crisis: The soldiers on the front line
In Avdiivka, eastern Ukraine, for the last eight years soldiers have been fighting Russian-backed separatists.
Tensions are mounting in the area, after Russian President Vladimir Putin recognised the so-called people's republics of Luhansk and Donetsk as independent states, ordering in troops for "peacekeeping" operations.
BBC International correspondent Orla Guerin spoke to some Ukrainian soldiers on the front line.
