Center on Europe and Eurasia

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)

A Ukrainian artilleryman confirms targets near Bakhmut, Ukraine, on February 7, 2023. (Yasuyoshi Chiba/AFP via Getty Images)

Ukrainian soldiers fire an artillery shell on the frontline in Donetsk, Ukraine, on December 4, 2022. (Diego Herrera Carcedo/Anadolu Agency via Getty Images)

(Screenshot via TVP World/YouTube)

The crew of a Leopard 2 main battle tank waiting for Chancellor Olaf Scholz during his visit to the Bundeswehr army training center in Ostenholz, Germany, on October 17, 2022. (David Hecker via Getty Images)

A US Army Patriot missile system launches a rocket as part of a NATO training exercise in Greece on November 11, 2017. (DVIDS)