▁Blo ody ▁Sunday . ▁ ▁As ▁Mar ib or ▁was ▁now ▁firm ly ▁in ▁the ▁hands ▁of ▁the ▁Sloven ian ▁forces ▁and ▁surrounded ▁completely ▁by ▁Sloven ian ▁territory ; ▁the ▁city ▁had ▁been ▁recogn ised ▁as ▁part ▁of ▁the ▁Kingdom ▁of ▁Ser bs , ▁Cro ats ▁and ▁Sloven es ▁without ▁a ▁ple bis cite ▁in ▁the ▁Tre aty ▁of ▁Saint - G erm ain ▁of ▁ 1 0 ▁September ▁ 1 9 1 9 ▁between ▁the ▁vict ors ▁and ▁German ▁Austria . ▁ ▁After ▁ 1 9 1 8 , ▁most ▁of ▁Mar ib or ' s ▁Aust rian ▁Germ ans ▁left ▁the ▁Kingdom ▁of ▁Sloven es , ▁Cro ats ▁and ▁Ser bs ▁for ▁Austria . ▁These ▁included ▁the ▁German - spe aking ▁officials ▁who ▁had ▁not ▁been ▁from ▁the ▁region . ▁Aust rian ▁German ▁schools , ▁clubs , ▁and ▁organizations ▁were ▁ordered ▁closed ▁by ▁the ▁new ▁state ▁of ▁Y ug oslav ia , ▁even ▁though ▁eth nic ▁Germ ans ▁still ▁made ▁up ▁more ▁than ▁ 2 5 % ▁of ▁the ▁city ' s ▁total ▁population ▁as ▁late ▁as ▁the ▁ 1 9 3 0 s . ▁A ▁policy ▁of ▁cultural ▁assim ilation ▁was ▁purs ued ▁in ▁Y ug oslav ia ▁against ▁the ▁Aust rian ▁German ▁minor ity ▁similar ▁to ▁the ▁German ization ▁policy ▁followed ▁by ▁Austria ▁against ▁its ▁Sloven e ▁minor ity ▁in ▁Car inth ia . ▁However , ▁in ▁the ▁late ▁ 1 9 3 0 s ▁the ▁policy ▁was ▁abandoned ▁and ▁the ▁Aust rian ▁German ▁minor ity ' s ▁position