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1·During the first world war the Balkans was divided into two camps: Serbia was fighting on the side of the triple entente against Bulgaria and Turkey which were in coalition with the central powers.

一战期间，巴尔干分成两个阵营：塞尔维亚在三国协约一方作战，而保加利亚和土耳其则与中央列强结盟。