Russian forces appear to have constructed a 30-kilometre-long barrier dubbed the “tsar train” in occupied Donetsk region, possibly to serve as a defensive line against future Ukrainian assaults. The Institute for the Study of War (ISW) says satellite imagery shows that Russian forces constructed a long line of train cars stretching from occupied Olenivka to Volnovakha over the past nine months. Residents on Ukraine’s frontline refuse to abandon their homes A Ukrainian open-source intelligence interactive online map reported that Russian forces have assembled more than 2,100 freight cars into a…