Ukrainian service members fire a shell from a M777 Howitzer at a front line, as Russia's attack on Ukraine continues, in Kharkiv Region, Ukraine July 21, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY

A member of the Ukrainian National Guard is seen at a position near a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

A Ukrainian serviceman is seen at a tank not far from front line, amid Russia's attack on Ukraine, in the Donbas region, Ukraine July 17, 2022. REUTERS/Gleb Garanich

Messages for Russian troops are seen on shells for a M777 Howitzer at a position of Ukrainian service members in a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine July 28, 2022. REUTERS/Vyacheslav Madiyevskyy

Members of the Ukrainian National Guard attend a training at a position near a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

A member of the Ukrainian National Guard eats an apple at a position near a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

A Ukrainian service member prepares a M777 Howitzer for fire at a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine July 28, 2022. REUTERS/Vyacheslav Madiyevskyy

A Ukrainian service member writes messages for Russian troops on shells for a M777 Howitzer at a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine July 28, 2022. REUTERS/Vyacheslav Madiyevskyy

A member of the Ukrainian National Guard is seen at a position near a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

A member of the Ukrainian National Guard is seen at a position near a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

Shells are seen as Ukrainian service members prepare to shoot from a towed howitzer FH-70 at a front line, as Russia's attack on Ukraine continues, in Donbas Region, Ukraine July 18, 2022. REUTERS/Gleb Garanich

A Ukrainian serviceman prepares shells for an M777 howitzer at a position on a front line, as Russia's attack on Ukraine continues, in Kharkiv region, Ukraine August 1, 2022. REUTERS/Sofiia Gatilova

A member of the Ukrainian National Guard sits near a Maxim machine gun at a position near a front line in Kharkiv region, as Russia's attack on Ukraine continues, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

A member of the Ukrainian National Guard jumps into a trench at a position near a front line, as Russia's attack on Ukraine continues, in Kharkiv region, Ukraine August 3, 2022. REUTERS/Vyacheslav Madiyevskyy

A Ukrainian service member checks an area after a shooting from a towed howitzer FH-70 at a front line, as Russia's attack on Ukraine continues, in Donbas Region, Ukraine July 18, 2022. REUTERS/Gleb Garanich

A car burns on the road, not far from front line, amid Russia's attack on Ukraine, in the Donbas region, Ukraine July 16, 2022. REUTERS/Gleb Garanich

A shelter made from package for shells for a M777 Howitzer is seen at a front line, as Russia's attack on Ukraine continues, in Kharkiv Region, Ukraine July 21, 2022. REUTERS/Gleb Garanich

Ukrainian service members stand near a M777 Howitzer at a front line, as Russia's attack on Ukraine continues, in Donbas Region, Ukraine July 18, 2022. REUTERS/Gleb Garanich

Ukrainian service members fire a shell from a towed howitzer FH-70 at a front line, as Russia's attack on Ukraine continues, in Donbas Region, Ukraine July 18, 2022. REUTERS/Gleb Garanich

A remains of a rocket shell is seen at a wheat field burned after shelling not far from front line, amid Russia's attack on Ukraine, in the Donbas region, Ukraine July 17, 2022. REUTERS/Gleb Garanich