Question: The Armée d'Orient fought on the front that was created as an aid to what country?
Sentence (from "Macedonian Front"): The Macedonian Front of World War I, also known as the Salonica Front (after Thessaloniki), was formed as a result of an attempt by the Allied Powers to aid Serbia, in the fall of 1915, against the combined attack of Germany, Austria-Hungary and Bulgaria.
Relevant evidence: Yes