Ukrainian servicemen ride atop by an APC towards frontline positions near Vuhledar, Donetsk region, Ukraine, Monday, May 1, 2023. (Photo by Libkos/AP Photo)





A Ukrainian soldier smiles as he stands in a trench on the frontline near Avdiivka, an eastern city where fierce battles against Russian forces have been taking place, in the Donetsk region, Ukraine, Friday, April 28, 2023. (Photo by Libkos/AP Photo)





A Ukrainian soldier smiles on the frontline in Bakhmut, Donetsk region, Ukraine, Sunday, April 23, 2023. (Photo by Libkos/AP Photo)





A Ukrainian soldier holds his helmet as he rides an APC in Bakhmut, in the Donetsk region, Ukraine, Wednesday, April 26, 2023. (Photo by Libkos/AP Photo)





A Ukrainian soldier prepares to fire his machine gun in a dugout on the frontline in the village of New York, Donetsk region, Ukraine, Monday, April 24, 2023. (Photo by Libkos/AP Photo)





Military paramedics treat an Ukrainian injured serviceman on a street in the frontline city of Bakhmut, Donetsk region on April 23, 2023, amid the Russian invasion of Ukraine. (Photo by Anatolii Stepanov/AFP Photo)





Ukrainian soldiers take their positions in Bakhmut, in the Donetsk region, Ukraine, Wednesday, April 26, 2023. (Photo by Libkos/AP Photo)





Members of the Ukrainian National Guard from the Bureviy Brigade participate in a military exercise in Kyiv region on Thursday, April 27, 2023. (Photo by Bernat Armangue/AP Photo)





Ukrainian servicemen from the 115 Territorial Defence brigade attend an exercise near the border with Belarus, amid Russia's attack on Ukraine, in Zhytomyr region, Ukraine on April 25, 2023. (Photo by Gleb Garanich/Reuters)





A Ukrainian service member from a 3rd separate assault brigade of the Armed Forces of Ukraine, poses for a picture with a dog in a shelter at a front line, amid Russia's attack on Ukraine, near the city of Bakhmut, Ukraine on April 23, 2023. (Photo by Sofiia Gatilova/Reuters)





A Ukrainian service member from a 3rd separate assault brigade of the Armed Forces of Ukraine, smokes in a shelter at a front line, amid Russia's attack on Ukraine, near the city of Bakhmut, Ukraine on April 23, 2023. (Photo by Sofiia Gatilova/Reuters)





A Ukrainian serviceman takes a rest near the town of Bakhmut, in the Donetsk region on April 28, 2023, amid the Russian invasion on Ukraine. (Photo by Dimitar Dilkoff/AFP Photo)





A Ukrainian soldier looks out from a dugout on the frontline in the village of New York, Donetsk region, Ukraine, Monday, April 24, 2023. (Photo by Libkos/AP Photo)





A Ukrainian soldier looks on as he stands in a trench on the frontline near Avdiivka, an eastern city where fierce battles against Russian forces have been taking place, in the Donetsk region, Ukraine, Friday, April 28, 2023. (Photo by Libkos/AP Photo)





A Ukrainian soldier fires an RPG toward Russian positions at the frontline near Avdiivka, an eastern city where fierce battles against Russian forces have been taking place, in the Donetsk region, Ukraine, Friday, April 28, 2023. (Photo by Libkos/AP Photo)