<prompt> Qedela umusho olandelayo:  <response>: Amabutho aseFinland aseMannerheim, ama-Estonia kanye neNorthern Corps akwazi ukumisa ukuqhubekela phambili kwamaBolshevik futhi aqala ukuhlasela okuphambene lapho athatha khona iPskov neYamburg ngoMeyi 1919. 