Russia has been steadily gaining in Ukraine but has focused its efforts on advancing in the country's eastern Donetsk region.

Pokrovsk has been dubbed a "fortress" city, key for Ukraine's logistics and a long-time stronghold for Kyiv in the east.

Below, we look at the current flashpoints of the roughly 640-mile front line. Ukraine captured a chunk of the Russian border region of Kursk after a daring cross-border attack in August.

Below, we look at the current flashpoints of the roughly 640-mile front line. Ukraine captured a chunk of the Russian border region of Kursk after a daring cross-border attack in August. They have ...

Russia has intensified its offensives on several fronts. Currently, its priority is the battle for Pokrovsk and the expulsion ...