These classes included military soldiers and officers , Cossacks , intellectuals , businessmen and landowners . Officials of the Russian Imperial Government and anti-Bolshevik governments of the Russian Civil War also left . They spanned all classes and included military soldiers and officers , Cossacks , intellectuals of various professions , dispossessed businessmen and landowners , as well as officials of the Russian Imperial Government and various anti-Bolshevik governments of the Russian Civil War period .