 During World War II, Kromiadi was a Nazi official and a pioneer of the Russian Liberation Movement.In 1942, he headed the Russian National People's Army, an armed unit of Russians, under the pseudonym of Sanin, together with engineer Sonderführer Sergei Ivanov of Russian fascist party.He was relieved by the Germans along with other Russian émigrés, at that time he tried unsuccessfully to take command of another Russian unit, the Druzhina Brigade.