Tanks, artillery and infantry have crossed from Russia into an unbreached part of eastern Ukraine in recent days, attacking Ukrainian forces and causing panic and wholesale retreat not only in this small border town but a wide swath of territory, in what Ukrainian and Western military officials described on Wednesday as a stealth invasion. The attacks outside this city and in an area to the north essentially have opened a new, third front in the war in eastern Ukraine between government forces and pro-Russian separatists, along with the fighting outside the cities of Donetsk and Luhansk. Exhausted, filthy and ... (full story)