Ukrainian soldiers prepare a long range drone near the Bakhmut frontline, in Donetsk Oblast, Ukraine on January 12, 2024. Drone warfare has become increasingly important as the war entered into a stalemate and both sides are heavily fortified. (Photo by Ignacio Marin/Anadolu via Getty Images)





Ukrainian servicemen of 2 battalion 92nd brigade prepare to fire a 120-mm towed artillery pieces-mortar 2B16 “Nona-K” which was captured in the battle with the Russian army, towards Russian troops, at a position near Bakhmut in Donetsk region, Ukraine on January 10, 2024. (Photo by Inna Varenytsia/Reuters)





Ukrainian service members of 79th brigade fire a L119 howitzer towards Russian troops near the front line town of Marinka, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on January 12, 2024. (Photo by Oleksandr Ratushniak/Reuters)





A Ukrainian serviceman of the 92nd Separate Assault Brigade looks on next to a M109A5 Paladin self-propelled howitzer at a position near the frontline town of Bakhmut, in Donetsk region, Ukraine on January 16, 2024. (Photo by Inna Varenytsia/Reuters)





Ukrainian servicemen of the 92nd Separate Assault Brigade fire a M109A5 Paladin self-propelled howitzer towards Russian troops near the frontline town of Bakhmut, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on January 16, 2024. (Photo by Inna Varenytsia/Reuters)





Ukrainian servicemen of the 93rd separate mechanized brigade wear ghillie suits during training near the front line in the Donetsk region, amid Russia’s attack on Ukraine, on December 25, 2023. (Photo by Thomas Peter/Reuters)





Ukrainian soldiers by an anti-aircraft vehicle towards its position at the Bakhmut frontline, in Donetsk Oblast, Ukraine on January 13, 2024. Drone and air strikes have become increasingly important as the war entered into a stalemate and both sides are heavily fortified. (Photo by Ignacio Marin/Anadolu via Getty Images)





Ukrainian servicemen of the 128th separate mountain assault Transcarpathian brigade of the Armed Forces of Ukraine take part in tank drills, amid Russia's attack on Ukraine, in Zaporizhzhia region, Ukraine on January 11, 2024. (Photo by Reuters/Stringer)





Ukrainian soldiers of Ukrainian National Guard hold their positions in the snow-covered Serebryan Forest in temperatures of –15°C on January 12, 2024 in Kreminna, Donetsk Oblast, Ukraine. (Photo by Kostiantyn Liberov/Libkos/Getty Images)





Ukrainian servicemen of the 128th separate mountain assault Transcarpathian brigade of the Armed Forces of Ukraine take part in tank drills, amid Russia's attack on Ukraine, in Zaporizhzhia region, Ukraine on January 11, 2024. (Photo by Reuters/Stringer)





Ukrainian servicemen of 2 battalion 92nd brigade rest inside a dugout, at a position near Bakhmut in Donetsk region, Ukraine on January 10, 2024. (Photo by Inna Varenytsia/Reuters)





A Ukrainian serviceman smokes at a position near a front line, in Zaporizhzhia region, Ukraine on January 14, 2024. (Photo by Reuters/Stringer)





Ukrainian service members of 79th brigade fire a L119 howitzer towards Russian troops near the front line town of Marinka, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on January 12, 2024. (Photo by Oleksandr Ratushniak/Reuters)





Ukrainian soldiers of Ukrainian National Guard hold their positions in the snow-covered Serebryan Forest in temperatures of –15°C on January 12, 2024 in Kreminna, Donetsk Oblast, Ukraine. (Photo by Kostiantyn Liberov/Libkos/Getty Images)





Ukrainian soldiers prepare a long range drone near the Bakhmut frontline, in Donetsk Oblast, Ukraine on January 12, 2024. Drone warfare has become increasingly important as the war entered into a stalemate and both sides are heavily fortified. (Photo by Ignacio Marin/Anadolu via Getty Images)