Ukrainian state emblem is seen on a gun's holster as soldiers guard naval base in the village of Novoozernoye, some 91 km west of Crimean capital Simferopol, Ukraine, on Monday, March 3, 2014. Ukraine says Russian forces controlling the strategic region of Crimea are demanding that the crew of two Ukrainian warships in Sevastopol's harbor must surrender. (Photo by Ivan Sekretarev/AP Photo)

Ukrainians pour water on each other on a street in Lviv, Ukraine, 02 May 2016. The tradition of pouring water was an ancient spring ritual of cleansing on first Monday after Orthodox Easter. (Photo by Mykola Tys/EPA)

Ukrainian serviceman fires with a heavy machine gun during a combat with Russia-backed separatists on the front line near Gorlivka, Donetsk Region on September 28, 2019. (Photo by Anatolii Stepanov/AFP Photo)

Ukrainian paratrooper Andrii Bashtovyi reacts as he see his comrades in the recently retaken area of Izium, Ukraine, Wednesday, September 14, 2022. (Photo by Evgeniy Maloletka/AP Photo)

Ukrainian serviceman Valerii looks on at a position in a frontline, amid Russia's attack on Ukraine, in Mykolaiv region, Ukraine on October 26, 2022. (Photo by Valentyn Ogirenko/Reuters)

A Ukrainian serviceman of the 3rd Assault Brigade fires a 122mm mortar towards Russian positions at the front line, near Bakhmut, Donetsk region, Ukraine, Sunday, July 2, 2023. (Photo by Alex Babenko/AP Photo)

A Ukrainian serviceman of the 53rd brigade fires a RPG-9 towards Russian positions at the frontline close to Donetsk, Ukraine, Saturday, August 19, 2023. (Photo by Libkos/AP Photo)

A cat sits on the shoulder of Ukrainian serviceman Mykyta of the 93rd separate mechanized brigade at a rest house near the front line in the Donetsk region on December 25, 2023. (Photo by Thomas Peter/Reuters)