By definition of the Second International, a war is a military conflict in which two or more nations, organizations, alliances, or ethnic groups of people engage in combat, whether economic by nature or (more commonly) militaristic by nature, in which the goal of the parties are either to defend themselves, or gain resources, land, or a political gain.

Start End War Name Victor Loser
Spanish-American War USA Spain
Russian Revolution of 1905 Russia Revolutionaries
Mexican Revolution Revolutionaries Porfirio Díaz
First Balkan War
  • Bulgaria
  • Greece
  • Serbia
  • Montenegro
Ottoman Empire
Second Balkan War
  • Ottoman Empire
  • Greece
  • Serbia
  • Montenegro
  • Romania
Great War Triple Entente Central Powers
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