Members of the Ukrainian National Guard fire a D-30 howitzer towards Russian troops, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

Members of the Ukrainian National Guard load shell to a D-30 howitzer near a frontline, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

A member of the Ukrainian National Guard fires a D-30 howitzer towards Russian troops, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

A member of the Ukrainian National Guard prepares shells for a D-30 howitzer near a frontline, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

A member of the Ukrainian National Guard prepares a D-30 howitzer for a fire towards Russian troops, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

A member of the Ukrainian National Guard fires a D-30 howitzer towards Russian troops, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

Members of the Ukrainian National Guard prepare shells for a D-30 howitzer near a frontline, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy 

A member of the Ukrainian National Guard fires a D-30 howitzer towards Russian troops, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine October 5, 2022. REUTERS/Vyacheslav Madiyevskyy TPX IMAGES OF THE DAY 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Gunners from the 30th Field Regiment Royal Canadian Artillery gun salute with Howitzers at the Canadian National War Memorial during the commemoration of the death of Britain's Queen Elizabeth in Ottawa, Ontario, Canada September 19, 2022. REUTERS/Lars Hagberg 

Ukrainian servicemen are seen near a Polish self-propelled howitzer Krab, amid Russia's attack on Ukraine in Kharkiv region, Ukraine September 13, 2022. REUTERS/Gleb Garanich 

Ukrainian servicemen are seen near a Polish self-propelled howitzer Krab, amid Russia's attack on Ukraine in Kharkiv region, Ukraine September 13, 2022. REUTERS/Gleb Garanich 

A Ukrainian serviceman stands at a Polish self-propelled howitzer Krab, amid Russia's attack on Ukraine in Kharkiv region,Ukraine September 13, 2022. REUTERS/Gleb Garanich 

A Ukrainian serviceman stands at a Polish self-propelled howitzer Krab, amid Russia's attack on Ukraine in Kharkiv region, Ukraine September 13, 2022. REUTERS/Gleb Garanich 

A service member of the self-proclaimed Donetsk People's Republic fires a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict, outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A service member of the self-proclaimed Donetsk People's Republic walks past ammunition boxes at a firing position during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

A service member of the self-proclaimed Donetsk People's Republic fires a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

A service member of the self-proclaimed Donetsk People's Republic fires a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

A service member of the self-proclaimed Donetsk People's Republic fires a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

Service members of the self-proclaimed Donetsk People's Republic fire a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

A service member of the self-proclaimed Donetsk People's Republic fires a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

A service member of the self-proclaimed Donetsk People's Republic fires a Giatsint-B howitzer in the direction of Avdiivka during Russia-Ukraine conflict outside Donetsk, Ukraine September 7, 2022. REUTERS/Alexander Ermochenko 

Ukrainian servicemen stand near self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

Ukrainian servicemen stand near self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman looks out from self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region,Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman looks out from self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman drives self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman stands in self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region,Ukraine, August 23, 2022. REUTERS/Ammar Awad 

Ukrainian servicemen stand near self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region,Ukraine, August 23, 2022. REUTERS/Ammar Awad 

Ukrainian servicemen fire towards Russian troops on self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman stands on self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman stands on self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

A Ukrainian serviceman stands inside self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

Ukrainian servicemen fire towards Russian troops on self-propelled AHS Krab howitzer as Russia's attack in Ukraine continues ,in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

Ukrainian servicemen fire towards Russian troops on self-propelled AHS Krab howitzer, as Russia's attack in Ukraine continues, in Donetsk region, Ukraine, August 23, 2022. REUTERS/Ammar Awad 

Russian self-propelled howitzer "Malka" drives during International Military and Technical Forum 2022 in Alabino outside Moscow, Russia August 17, 2022. REUTERS/Maxim Shemetov 

An M777 howitzer is on display during the exhibition of weaponry and equipment that, according to the Russian defence ministry, were captured during the military conflict in Ukraine, at the international military-technical forum Army-2022 at Patriot Congress and Exhibition Centre in the Moscow region, Russia August 17, 2022. REUTERS/REUTERS PHOTOGRAPHER 

A Ukrainian serviceman fires with a D-30 howitzer near a frontline in Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine August 13, 2022. REUTERS/Oleksandr Ratushniak 

A Ukrainian serviceman prepares a D-30 howitzer for fire near a frontline in Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine August 13, 2022. REUTERS/Oleksandr Ratushniak 

A Ukrainian serviceman stand next to a D-30 howitzer near a frontline in Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine August 13, 2022. REUTERS/Oleksandr Ratushniak 

Ukrainian servicemen prepare a D-30 howitzer for fire near a frontline in Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine August 13, 2022. REUTERS/Oleksandr Ratushniak 

A Ukrainian serviceman fires with a D-30 howitzer near a frontline in Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine August 13, 2022. REUTERS/Oleksandr Ratushniak 

A Ukrainian serviceman fires with a D-30 howitzer near a frontline in Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine August 13, 2022. REUTERS/Oleksandr Ratushniak 

Service members of the self-proclaimed Luhansk People's Republic fire a 2A65 Msta-B howitzer in the direction of Soledar during Ukraine-Russia conflict in the Luhansk Region, Ukraine August 13, 2022. REUTERS/Alexander Ermochenko 

Service members of the self-proclaimed Luhansk People's Republic prepare to fire a 2A65 Msta-B howitzer in the direction of Soledar during Ukraine-Russia conflict in the Luhansk Region, Ukraine August 13, 2022. REUTERS/Alexander Ermochenko 

Service members of the self-proclaimed Luhansk People's Republic prepare to fire a 2A65 Msta-B howitzer in the direction of Soledar during Ukraine-Russia conflict in the Luhansk Region, Ukraine August 13, 2022. REUTERS/Alexander Ermochenko 

A service member of the self-proclaimed Luhansk People's Republic carries a shell for a 2A65 Msta-B howitzer while firing in the direction of Soledar during Ukraine-Russia conflict in the Luhansk Region, Ukraine August 13, 2022. REUTERS/Alexander Ermochenko 

Service members of the self-proclaimed Luhansk People's Republic fire a 2A65 Msta-B howitzer in the direction of Soledar during Ukraine-Russia conflict in the Luhansk Region, Ukraine August 13, 2022. REUTERS/Alexander Ermochenko 

Ukrainian servicemen ride a self-propelled howitzer not far from front line, amid Russia's attack on Ukraine, in the Donetsk region, Ukraine August 12, 2022. REUTERS/Stringer 

Ukrainian servicemen ride a self-propelled howitzer not far from front line, amid Russia's attack on Ukraine, in the Donetsk region, Ukraine August 12, 2022. REUTERS/Stringer 

Ukrainian servicemen ride self-propelled howitzers not far from front line, amid Russia's attack on Ukraine, in the Donetsk region, Ukraine August 12, 2022. REUTERS/Stringer 

Soldiers fire 155mm howitzers during an annual live fire military exercise in Pingtung county, southern Taiwan, August 11, 2022. REUTERS/Ann Wang