Center on Europe and Eurasia

A Swedish CB90-class fast assault craft approaches the well deck of the Whidbey Island-class dock landing ship USS Gunston Hall during exercise Steadfast Defender 24 on March 6, 2024, in the Norwegian Sea. (US Navy photo by Mass Communication Specialist 1st Class Danielle Serocki)

Ukrainian soldiers of the 79th brigade in the frontline city of Vuhledar, Ukraine, on March 12, 2024. (Photo by Wolfgang Schwan/Anadolu via Getty Images)

Ukrainian soldiers receive training at an undisclosed location in Donetsk Oblast, Ukraine, on March 6, 2024. (Photo by Jose Colon/Anadolu via Getty Images)

Ukrainian soldier demonstrates firing the MBT-NLAW provided by the United Kingdom. (Alex Chan Tsz Yuk via Getty Images)

A Ukrainian soldier looks at the sky after hearing the sound of a nearby drone at the Bakhmut front line in Donetsk Oblast, Ukraine, on January 13, 2024. (Photo by Ignacio Marin/Anadolu via Getty Images)

Russian President Vladimir Putin listens to Defence Minister Sergei Shoigu on February 23, 2024, in Moscow, Russia. (Photo by Contributor/Getty Images)

A joint press conference with NATO Secretary General Jens Stoltenberg and Swedish Prime Minister Ulf Kristersson on March 8, 2023. (NATO via Flickr)

Ukrainian soldiers of a tank unit continue their military mobility to prepare for combat as the Russia-Ukraine War continues after the second year anniversary in Donetsk Oblast, Ukraine, on March 1, 2024. (Jose Colon via Getty Images)

Ukrainian servicemen of the Skala battalion perform a medical evacuation during a field military exercise in the Donetsk region on February 3, 2024. (Photo by Genya Savilov/AFP via Getty Images)

A school director inspects a classroom damaged as a result of a Russian missile attack in Lviv, Ukraine, on February 15, 2024. (Yuriy Dyachyn/AFP via Getty Images)

A Ukrainian soldier throws a grenade from a trench during a training in Donetsk Oblast, Ukraine, on February 7, 2024. (Diego Herrera Carcedo via Getty Images)

Soldiers from Task Force Stalwart on March 28, 2018, in a post in the outskirts of Afghanistan. (US Army via DVIDS)