9 1 2 . ▁On ▁ 8 ▁January ▁ 1 9 1 6 , ▁during ▁World ▁War ▁I , ▁Austria - H ung ary ▁took ▁the ▁city . ▁Pe ć ▁was ▁taken ▁by ▁Ser bian ▁forces ▁on ▁ 1 7 ▁October ▁ 1 9 1 8 . ▁After ▁World ▁War ▁I , ▁the ▁city ▁became ▁part ▁of ▁Y ug oslav ia ▁( at ▁first ▁officially ▁called ▁the ▁Kingdom ▁of ▁Ser bs , ▁Cro ats ▁and ▁Sloven es ). ▁Between ▁ 1 9 3 1 ▁and ▁ 1 9 4 1 ▁the ▁city ▁was ▁part ▁of ▁Z eta ▁Ban ov ina . ▁During ▁World ▁War ▁II ▁Pe ć ▁was ▁occupied ▁by ▁the ▁Italian ▁pu ppet ▁state ▁of ▁Alban ia . ▁After ▁the ▁war , ▁Pe ć ▁again ▁became ▁part ▁of ▁Y ug oslav ia ▁as ▁part ▁of ▁the ▁Aut onom ous ▁Region ▁of ▁Kos ovo ▁and ▁Met oh ija ▁( 1 9 4 5 – 1 9 6 3 ), ▁an ▁autonom ous ▁unit ▁within ▁the ▁Social ist ▁Republic ▁of ▁Ser bia . ▁ ▁Rel ations ▁between ▁Ser bs ▁and ▁Alban ians , ▁who ▁were ▁the ▁majority ▁population , ▁were ▁often ▁t ense ▁during ▁the ▁ 2 0 th ▁century . ▁They ▁came ▁to ▁a ▁head ▁in ▁the ▁Kos ovo ▁War ▁of ▁ 1 9 9 9 , ▁during ▁which ▁the ▁city ▁suffered ▁heavy ▁damage ▁and ▁mass ▁kill ings . ▁More ▁than ▁ 8 0 ▁percent ▁of ▁the ▁total ▁ 5 2 8 0 ▁houses ▁in ▁the ▁city ▁were ▁heavily ▁dam aged ▁( 1