The Russo-Japanese War was from 1904 to 1905. According to wikipedia, the fledgling Japanese military consistently attained victory over the Russian forces arrayed against them, which was unexpected by world observers. I extracted and colored this image from a picture illustrating a story written by Adachi Kinnosuke in The Washington Times, April 24, 1904. Without a question, this image is in the public domain.
日俄戰爭戰鬥人員
combatants、flag、imperial japan、japan、russia、sword、war
戰鬥、旗、日本帝國、日本、俄國、劍、戰爭
資料來源：openclipart ( https://openclipart.org/ )