Who against who in World War One.

"World War I Sides Puzzle" is a small knowledge level game to sort the flags of the countries on Central or Allied sides. Online history exercise to explore and study the participants in the First World War. Fun history educational game, suitable for online lessons and interactive classes. Free online game. WW1 puzzle. WW I quiz. Minute to win it game.

There are 19 flags of countries involved in the conflict of the First World War at the top of the screen. In the middle, there are the two major alliances fighting against each other - one in blue and one in red. Just drag and drop the flag in the correct side and it will automatically align under the allience division. Place all the flags for less than 21 tries for a good school mark.

World War I, also known as the First World War or the Great War, was an international conflict that began on 28 July 1914 and ended on 11 November 1918. It involved much of Europe, as well as Russia, the United States and Turkey, and was also fought in the Middle East, Africa and parts of Asia.

In 1914, the Great Powers were divided into two opposing alliances: the Triple Entente, consisting of France, Russia, and Britain, and the Triple Alliance, made up of Germany, Austria-Hungary, and Italy. Tensions in the Balkans came to a head on 28 June 1914 following the assassination of Archduke Franz Ferdinand, the Austro-Hungarian heir, by Gavrilo Princip, a Bosnian Serb. Austria-Hungary blamed Serbia and the interlocking alliances involved the Powers in a series of diplomatic exchanges known as the July Crisis. On 28 July, Austria-Hungary declared war on Serbia; Russia came to Serbia's defence and by 4 August, the conflict had expanded to include Germany, France and Britain, along with their respective colonial empires. In November, the Ottoman Empire, Germany and Austria formed the Central Powers, while in April 1915, Italy joined Britain, France, Russia and Serbia as the Allied Powers.

Driven by its sick ambitions on the Balkans, on 14 October 1915 Bulgaria declared war on Serbia thus entering the war on Centra Powers side.