the latvian war Military_operation of independence ( ) , sometimes called Name_conferral the latvia 's freedom struggles Hostile_encounter ( ) or the latvian war Military_operation of liberation ( , `` war Military_operation of latvian liberation '' ) , was a series of military conflicts Hostile_encounter in latvia between 5 december 1918 , after the newly proclaimed Statement republic of latvia was invaded Attack by soviet russia , and the signing Sign_agreement of the unk riga peace treaty on 11 august 1920 .

much of the territory allocated to poland in the treaty of riga became Becoming part of the soviet union after world war ii , when the common border was re-defined by the allied powers in close accordance with the curzon line .