World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a global conflict between two coalitions: the Allies...

The aftermath of World War I saw far-reaching and wide-ranging cultural, economic, and social change across Europe, Asia, Africa, and even in areas outside...

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...

The total number of military and civilian casualties in World War I was about 40 million: estimates range from around 15 to 22 million deaths and about...

The identification of the causes of World War I remains a debated issue. World War I began in the Balkans on July 28, 1914, and hostilities ended on November...

century, World War I (1914–1918) and World War II (1939–1945), although some historians have also characterised other global conflicts as world wars, such...

causes of World War II included unresolved tensions in the aftermath of World War I and the rises of fascism in Europe and militarism in Japan, and it was...

This is a list of the events of World War I in chronological order. Diplomatic history of World War I Albertini 1953, p. 38. Keegan 1998, p. 53. Lowe...

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...

years, but the first large-scale use of chemical weapons was during World War I. They were primarily used to demoralize, injure, and kill entrenched...