Central Powers of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria in World War I (1914–1918). By the end of the first decade of the 20th century...

The Allies, formally referred to as the United Nations from 1942, were an international military coalition formed during World War II (1939–1945) to oppose...

Axis & Allies: World War I 1914 is a war and strategy board wargame in the Axis and Allies series created by Larry Harris and published by Avalon Hill...

The United States declared war on the German Empire on April 6, 1917, nearly three years after World War I started. A ceasefire and armistice were declared...

history of World War I Triple Alliance (1882) International relations of the Great Powers (1814–1919) Allies of World War I Home front during World War I covering...

expressed a preference for America at a rate of 50% or more. Neutral country Allies of World War I Allies of World War II Airline alliance Business alliance...

(Belgium and Japan, for example) also joined the Allies. For a detailed chronology see timeline of World War I. Non-military diplomatic and propaganda interactions...

World War I or the First World War (28 July 1914 – 11 November 1918) was a global conflict between two coalitions: the Allies and the Central Powers....

The Middle Eastern theatre of World War I saw action between 30 October 1914 and 30 October 1918. The combatants were, on one side, the Ottoman Empire...

This is a list of World War I Entente aircraft organized by country of origin. Dates are of first flight. Thetford, 1994, p.416 Bowers, 1979, p.154 Davilla...