MARIUPOL, Ukraine - With his army in retreat amid an influx of Russian soldiers and heavy weapons, Ukrainian President Petro Poroshenko is facing a tough choice between making concessions to Kremlin-backed separatists or fighting a bloody defensive war.
Russia's War Against Ukraine
Wall Street Journal: Russian muscle turns tide, leaving Ukraine few options
A Ukrainian soldier stands in an armoured personnel carrier (APC) at a checkpoint near Donetsk, eastern Ukraine, on September 2, 2014.
