WWI+Countries+Involved+in+Conflict

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Countries Involved:** Albania Arabia Austria-Hungary [|Belgium and colonies] Brazil Bulgaria China Costa Rica Cuba Czechoslovakia Estonia Finland [|France and Empire] [|Great Britain and Empire] [|Germany and Empire] Greece Guatemala Haiti Honduras [|Italy and colonies] Japan Latvia Liberia Lithuania Luxembourg Montenegro Nicaragua Panama Persia Philippines Poland [|Portugal and colonies] Romania Russia San Marino Serbia Siam Turkey Transcaucasia Unites States of America

Additional information / source : http://europeanhistory.about.com/library/weekly/blww1involvedmap.htm