Ukrayna Stratejik Kenti Kaybetti

Cannons of the Ukrainian armed forces are seen at their positions near Debaltseve, eastern Ukraine, Feb. 17, 2015.

Ukrainian artillery is at a position outside of the village of Luhanske, some 20 kilometers (14 miles) north of Debaltseve, Ukraine, Tuesday, Feb. 17, 2015.

Members of the Ukrainian armed forces ride on a military vehicle near Debaltseve, eastern Ukraine, Feb. 17, 2015.

Crosses marked only with numbers stand on the graves of unknown pro-Russian separatists at a cemetery in Donetsk, eastern Ukraine, Feb. 16, 2015.

Fighters from the separatist-controlled Donetsk region smoke near an armored personnel carrier in the village of Nikishine, southeast of Debaltseve, Feb. 17, 2015.

Fighting damaged buildings in the village of Nikishine, southeast of Debaltseve, Ukraine, Feb. 17, 2015.

A man looks at pictures of victims of the Maidan Square protests, which happened nearly one year ago, from February 20-22,  placed as a commemoration in Kyiv, Ukraine, Feb. 17, 2015.

Map of Debaltseve, Ukraine