ウクライナ人民共和国軍
On September 1, 1917, he was appointed Deputy Secretary of Military Affairs in the Ukrainian People's Republic, and received the rank of lieutenant-colonel of the Ukrainian People's Army. He resigned his position in March 1918 in protest of the Treaty of Brest-Litovsk and the subsequent entry of German troops into Ukraine. From April to October 1918 he led the Statistical Bureau and the Department of Education and Libraries in the Kherson Zemstvo.