Rubuta ci gaba don wannan sakin layi - Bayan yaƙin Rasha da Japan ya fara, an tura rukunin 8th a watan Yunin 1904. Da farko an kebe shi ne don mamayewar Jafananci da aka tsara na Primorskaya Oblast a babban yankin Siberia, amma an tura shi a matsayin rundunar ajiya don kewaye da Port Arthur maimakon bayan da aka ajiye wannan shirin. Daga nan aka ware shi don mamayewar Sakhalin da aka shirya
Rukunin na 8 ya kasance a cikin aji har sai an sanya shi a matsayin ƙarfafawa a yakin Sandepu a watan Janairun 1905. Ya yi aiki tare da bambanci, ya mayar da wani Rasha counterattack tare da 5th Division. A watan Fabrairun 1905, rukunin ya shiga cikin yakin Mukden.