A Ukrainian serviceman stands at his position at the frontline near Bakhmut, Donetsk region, Ukraine, Wednesday, January 11, 2023. (Photo by Evgeniy Maloletka/AP Photo)





Ukrainian soldiers hold their mobile phones in a shelter powered by a generator, as Russia's attack on Ukraine continues, during intense shelling in Bakhmut, Ukraine on December 26, 2022. (Photo by Clodagh Kilcoyne/Reuters)





A Ukrainian serviceman is seen at a frontline, amid Russia's attack on Ukraine, in Kherson region, Ukraine on January 4, 2023. (Photo by Oleksandr Ratushniak/Reuters)





Ukrainian combat medic Karina, 22, waits next to a road for injured servicemen, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on January 21, 2023. (Photo by Oleksandr Ratushniak/Reuters)





A Ukrainian serviceman is seen next to a BM-21 Grad multiple launch rocket system after firing towards Russian positions on a frontline near the town of Bakhmut, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on January 15, 2023. (Photo by Oleksandr Ratushniak/Reuters)





Ukrainian servicemen fire a mortar on a front line, as Russia's attack on Ukraine continues, in Bakhmut, Donetsk region, Ukraine on January 27, 2023. (Photo by Yan Dobronosov/Reuters)





Ukrainian members of the military fire an anti-aircraft weapon, as Russia's attack on Ukraine continues, in the frontline city of Bakhmut, Ukraine on January 10, 2023. (Photo by Clodagh Kilcoyne/Reuters)





A pilot approaches his helicopter at a Ukrainian military air base close to the frontline in the Kherson region, Ukraine, Sunday, January 8, 2023. (Photo by LIBKOS/AP Photo)





A Ukrainian serviceman prepares a Polish self-propelled howitzer Krab to fire toward Russian positions, amid Russia's attack on Ukraine, on a frontline in Donetsk region, Ukraine on January 17, 2023. (Photo by Oleksandr Ratushniak/Reuters)





A Ukrainian serviceman smokes a cigarette at his position at the frontline near Bakhmut, Donetsk region, Ukraine, Wednesday, January 11, 2023. (Photo by Evgeniy Maloletka/AP Photo)





Ukrainian servicemen attend combat training in Zaporizhzhia region, Ukraine, Tuesday, January 24, 2023. (Photo by Kateryna Klochko/AP Photo)





A Ukrainian soldier points at raising smoke on his position in the frontline near Soledar, Donetsk region, Ukraine, Wednesday, January 11, 2023. (Photo by Libkos/AP Photo)





A Ukrainian service member sits inside an infantry fighting vehicle during offensive and assault drills, amid Russia's attack on Ukraine, in Zaporizhzhia Region, Ukraine on January 23, 2023. (Photo by Reuters/Stringer)





A Ukrainian soldier waits for instructions in a shelter on the Donbass frontline, in Donetsk Oblast, Ukraine on January 16, 2023. (Photo by Diego Herrera Carcedo/Anadolu Agency via Getty Images)





Ukrainian soldiers are seen on their ways to frontlines with their armoured military vehicles as the strikes continue on the Donbass frontline, during Russia and Ukraine war in Donetsk Oblast, Ukraine on January 24, 2023. (Photo by Mustafa Ciftci/Anadolu Agency via Getty Images)