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

The city of Pokrovsk, a vital delivery and distribution hub for Ukraine's forces across a wide part of the front line, is in danger of being encircled.

Russia withdrew completely from the north. The following month, Ukrainian forces recaptured the southern city of Kherson. Since then, the battle has mostly been in the east of Ukraine with Russian ...