Premise: The Allies of World War I , or Entente Powers , were the countries that opposed the Central Powers in the First World War . The Central Powers ( Mittelmächte Központi hatalmak İttifak Devletleri or Bağlaşma Devletleri Централни сили Tsentralni sili ) , consisting of Germany , , the Ottoman Empire and Bulgaria -- hence also known as the Quadruple Alliance ( Vierbund ) -- was one of the two main factions during World War I ( 1914 -- 18 ) . Triple Entente . At the start of World War I in 1914 , all three Triple Entente members entered it as Allies of World War I against the Central Powers , Germany and Austria-Hungary . World War I . The Russian government collapsed in March 1917 , and a revolution in November followed by a further military defeat brought the Russians to terms with the Central Powers via the Treaty of Brest Litovsk , which granted the Germans a significant victory .
Hypothesis: World War I involved one group of countries fighting another.
Label: ENTAILMENT