A Ukrainian serviceman with the 65th Brigade opens the door of his armored vehicle at the frontline in the Zaporizhzhia region, Ukraine, on Sunday, April 21, 2024. (Photo by Andriy Andriyenko/AP Photo)





Hero of Ukraine Lieutenant Colonel Serhiy Verbytsky examines the remains of his SU-24M aircraft on the outskirts of the town of Izyum, Kharkiv Region, on April 17, 2024, amid the Russian invasion in Ukraine. On March 22, 2022, the crew of the SU-24M bomber, consisting of pilot Oleksiy Kovalenko and navigator Serhiy Verbytsky, bombed a column of Russian heavy equipment, after which their plane was shot down. The pilot Oleksiy Kovalenko died, and the navigator Serhiy Verbytskyi managed to eject and the injured man to get to the Ukrainian positions. Both pilots were awarded the title Hero of Ukraine. (Photo by Anatolii Stepanov/AFP Photo)





Members of the Siberian Battalion of the Ukrainian Armed Forces' International Legion attend military exercises, amid Russia's attack on Ukraine, at an undisclosed location in Kyiv region, Ukraine on April 10, 2024. (Photo by Valentyn Ogirenko/Reuters)





A Ukrainian serviceman walks past a recruiting poster in Kyiv on April 23, 2024, amid the Russian invasion of Ukraine. (Photo by Sergei Supinsky/AFP Photo)





Ukrainian servicemen from Mountain Assault Brigade screw the wheel to T-30 cannon to move it to a new position, at the frontline in Soledar direction, Donetsk region, Ukraine, Saturday, April 6, 2024. (Photo by Alex Babenko/AP Photo)





Ukrainian soldiers from the assault brigade inflict fire damage with a 120 mm mortar while supporting the assault operations of the infantry on April 19, 2024 in Ukraine. The country's Prime Minister Denys Shmyhal has warned its allies that if more military aid for Ukraine is not approved soon, such as the long-stalled aid package from the United States, it could usher in a “Third World War”. (Photo by Kostiantyn Liberov/Libkos/Getty Images)





Ukrainian medics and doctors of Azov brigade are seen at a stabilization position as Russia-Ukraine war continues in the direction of Lyman, Ukraine on April 07, 2024. (Photo by Wolfgang Schwan/Anadolu via Getty Images)





Soldiers attend the 2nd International Legion training as Russia-Ukraine war continues in Lyman, Donetsk Oblast, Ukraine on April 08, 2024. (Photo by Wojciech Grzedzinski/Anadolu via Getty Images)





A soldier holds a puppy “Knop” in a dugout on April 27, 2024 in Kherson region, Ukraine. The 37th separate brigade of marines performs a combat mission in support of the infantry on the left bank of the Dnipro. The Ukrainian soldiers operate a 2S1 Gvozdika (“Carnation”) self-propelled howitzer, a Soviet-era gun that uses 122mm shells, which Ukraine procures from abroad. The Ukrainian government has told its Western allies that it is in desperate need of weapons and ammunition as it defends itself from the large-scale attack that Russia launched in February 2022. (Photo by Kostiantyn Liberov/Libkos/Getty Images)





Soldiers from the Ukrainian 63rd Brigade are hiding artillery unit 2S3 Akatsiya, a Russian-made self-propelled howitzer of 152 caliber, on the firing positions as Russia-Ukraine war continues in Lyman, Donetsk Oblast, Ukraine on April 13, 2024. Due to a lack of ammunition, they fire only a few times a day and mostly wait. (Photo by Wojciech Grzedzinski/Anadolu via Getty Images)





A Ukrainian serviceman from the Azov brigade, known by the call sign Chaos, smokes a cigarette while he waits for a command to fire, in a dugout around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (Photo by Alex Babenko/AP Photo)





Members of the Siberian Battalion, which was formed mostly of volunteer Russian citizens, of the Ukrainian Armed Forces' International Legion, practice during military exercises, amid Russia's attack on Ukraine, at an undisclosed location in Kyiv region, Ukraine, Wednesday, April 10, 2024. (Photo by Efrem Lukatsky/AP Photo)





Servicemen of the 1148th separate artillery brigade of Air Assault Troops of Ukraine fire a M777 howitzer towards Russian troops, amid Russia's attack on Ukraine, in Donetsk region, Ukraine April 20, 2024. (Photo by Serhii Nuzhnenko/Radio Free Europe/Radio Liberty via Reuters)





A Ukrainian serviceman smokes sitting on a bench as a local resident clears debris near a building damaged in the Russian air raid in the town of Orikhiv, Zaporizhzhia region, Ukraine, Friday, April 5, 2024. (Photo by Andriy Andriyenko/AP Photo)





A Ukrainian serviceman from an anti-drone mobile air defence unit fires a machine gun towards a Russian kamikaze drone, amid Russia's attack on Ukraine, in Kherson region, Ukraine on April 19, 2024. (Photo by Ivan Antypenko/Reuters)