Center on Europe and Eurasia

A Ukrainian army artillery crew dismounts from a self-propelled 122mm howitzer after firing on a Russian position on February 18, 2023, near Bakhmut, Ukraine. (John Moore/Getty Images)

Members of the Ukrainian Volunteer Army prepare to fire a rocket propelled grenade while testing weapons systems on February 25, 2023, in Donbas, Ukraine. (John Moore/Getty Images)

Ukrainian President Volodomyr Zelenskyy in Kyiv, Ukraine, on February 27. 2023. (President of Ukraine via Flickr)

Participants drill shooting positions at a combat training day hosted by a local paramilitary civil formation called TSEL on February 22, 2023, in Lviv, Ukraine. (Sean Gallup/Getty Images)

(Screenshot via WELT/YouTube)

Russian diesel-electric Kilo class submarine Rostov-on-Don sails through the Bosphorus Strait on its way to the Black Sea on February 13, 2022. (Photo by Ozan Kose / AFP via Getty Images)

US Marines with Fighter Attack Squadron 312 prepare F/A-18 Hornets to take off for flight from Łask Air Base in Poland on April 27, 2022. (US Marine Corps photo by Adam Henke)

(Screenshot via YouTube)

A monument of a Soviet tank with a Ukrainian flag in Bakhmut, Ukraine, on January 29, 2023. (Marek M. Berezowski/Anadolu Agency via Getty Images)

Ukrainian and Polish soldiers hold wreaths during Ukrainian President Volodymyr Zelenskyy and Polish President Andrzej Duda's visit to Lychakiv Cemetery in Lviv, Ukraine, on January 11, 2023. (President of Ukraine via Flickr)

Vladimir Putin. (Kremlin)

(Screenshot via BBC)