Who was on the losing side in world war 1?

The Allied Powers defeated the Central Powers.

Central Powers:

• Austria-Hungary
• German Empire
• Ottoman Empire
• Bulgaria

Allied Powers:

• Russia
• United Kingdom:
  • Canada
  • Australia
  • India
  • New Zealand
  • Newfoundland
  • South Africa
• France
• United States
• Italy
• Japan
• Serbia
• Belgium
• Romania
• Portugal
• Montenegro
• Cuba
• Panama
• Greece
• Siam
• Liberia
• Brazil
• Guatemala
• Nicaragua
• Costa Rica
• Honduras
• Haiti
• Insurgent Nationalities that seceded from their constituent Central Powers states to fight with the allies:
  • Poles
  • Czechoslocak Legions
  • The Hejaz
  • Armenians