More than two weeks into its surprise offensive in western Russia, Ukraine’s advance has slowed, with its troops making only marginal gains around territory they already control.

But more than 200 miles to the southeast, another offensive is gaining momentum: Russia’s drive toward Pokrovsk, a stronghold in Ukraine’s eastern Donetsk region. In recent days, Moscow’s troops have seized at least three settlements and reached the outskirts of a town along a railroad to Pokrovsk, a logistics hub for the Ukrainian Army in the region.

The Russian advance has put the Ukrainians in the precarious position of defending one critical front while attempting to press forward on another, all with limited troop numbers and weaponry. President Volodymyr Zelensky said this week that Ukraine was working on boosting its forces in the east with more men and weapons to resist the Ukrainian advance.

Here’s a look at the overall situation on the battlefield.

Russia pushes toward Pokrovsk

This week, Russian forces have captured three more villages near Pokrovsk, according to DeepState, an analytical group with close ties to the Ukrainian Army, expanding their hold on the area. Moscow’s troops are now about eight miles from the center of Pokrovsk.

“They’re now within artillery range of the city,” Michael Kofman, a senior fellow in the Russia and Eurasia program at the Carnegie Endowment for International Peace, told the military podcast War on the Rocks on Wednesday.

Pokrovsk, a city of more than 40,000 inhabitants, is a transit hub for Ukrainian forces in the east. It sits on a key road, Highway T054, linking several cities that form a defensive arc protecting the part of the Donetsk region that is still held by Ukraine.