Uncover the hidden losses of a Russian elite regiment in Ukraine. - BBC

The Donbas has become a battle of attrition with high casualties on both sides, BBC Newsnight charts the impact of the war on the Russian side from the 331st regiment's home in Kostroma to the evolution of symbols painted on their tanks. In April, we confirmed 39 soldiers had been killed but now BBC Newsnight estimates the total number of casualties to be between 400-500, almost half of the regiment's strength from the beginning of the war.