The publication includes the diaries of Colonel of the Kuban Cossack Army, historian of the Russian diaspora Fyodor Ivanovich Eliseev (1892-1987). Ingenuous, truthful records of the fighting everyday life of Cossack formations on the Caucasian front during the First World War and Cossacks of the Khopersky Cossack army during the fratricidal years of the Civil War will tell modern readers about the heroism of ordinary soldiers and commanders, about Cossack customs and traditions, recreating the fate of an entire heroic generation.