Bogdana, 17, laughs with her boyfriend, Ivan, 19, in Brovary, Ukraine, Sunday, March 20, 2022. Russian forces pushed deeper into Ukraine's besieged and battered port city of Mariupol on Saturday, where heavy fighting shut down a major steel plant and local authorities pleaded for more Western help. (Photo by Vadim Ghirda/AP Photo)

A handout picture provided by the Vatican Media shows Pope Francis holding a flag of Ukraine that was sent to him from the Ukrainian town of Bucha during the weekly general audience in the Paul VI Audience Hall, in Vatican City, 06 April 2022. The pontiff lamented the “massacre of Bucha”, in the Kyiv suburb where dozens of bodies in civilian clothing have been found, and renewed his calls for an end to the war in Ukraine. (Photo by Vatican Media Handout/EPA/EFE)

An activist with a painted face symbolizing the count of days spent in captivity attends the Free Azov rally in support of the captured defenders of Mariupol on April 21, 2024 in Kyiv, Ukraine. The participants came out to remind about the Ukrainian soldiers who have been held in Russian captivity for more than two years. (Photo by Yan Dobronosov/Global Images Ukraine via Getty Images)

A young woman holds a weapon during a basic combat training for civilians, organized by the Special Forces Unit Azov, of Ukraine's National Guard, in Mariupol, Donetsk region, eastern Ukraine, Sunday, February 13, 2022. The United States is evacuating almost all of the staff from its embassy in Kyiv as Western intelligence officials warn that a Russian invasion of Ukraine is increasingly imminent. (Photo by Vadim Ghirda/AP Photo)

“Cossacks are a group of predominantly East Slavic people who originally were members of democratic, semi-military communities in Ukraine and Southern Russia. They inhabited sparsely populated areas and islands in the lower Dnieper and Don basins, and played an important role in the historical development of both Ukraine and Russia”. – Wikipedia

Photo: Кубанский казачий хор (Kuban Cossack chorus) - Розпрягайте, хлопцi, коней (Unharness The Horses, Guys!) – Ukrainian

A Ukrainian police officer takes cover in front of a burning building that was hit in a Russian airstrike in Avdiivka, Ukraine, Friday, March 17, 2023. (Photo by Evgeniy Maloletka/AP Photo)

A woman holds her dog after arriving from Russian-occupied territory at a registration and processing area for internally displaced people in Zaporizhzhia, in Ukraine, on May 8, 2022. (Photo by Dimitar Dilkoff/AFP Photo)

A person reacts during an anti-war protest, after Russia launched a massive military operation against Ukraine, in Moscow, Russia on February 24, 2022. (Photo by Evgenia Novozhenina/Reuters)