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 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...

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...

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...

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...

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...

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...

Technology during World War I (1914–1918) reflected a trend toward industrialism and the application of mass-production methods to weapons and to the...

The development of tanks in World War I was a response to the stalemate that developed on the Western Front. Although vehicles that incorporated the basic...

Following their defeat in World War I, the Central Powers agreed to pay war reparations to the Allied Powers. Each defeated power was required to make...

During World War I (1914–1918), belligerents from both the Allied Powers and Central Powers violated international criminal law, committing numerous war crimes...

The United States entered into World War I in April 1917, more than two and a half years after the war began in Europe. Apart from an Anglophile element...

World War III (WWIII or WW3), also known as the Third World War, is a hypothetical future global conflict subsequent to World War I (1914–1918) and World...

Front or Eastern Theater of World War I (German: Ostfront; Romanian: Frontul de răsărit;), for Russia Second Patriotic War (Russian: Вторая Отечественная...

World War I was the first major conflict involving the large-scale use of aircraft. Tethered observation balloons had already been employed in several...

Jagdgeschwader I (JG I) of World War I, was a fighter wing of the German Luftstreitkräfte, comprising four Jastas (fighter squadrons). The first unit...

Bulgaria participated in World War I on the side of the Central Powers from 14 October 1915, when the country declared war on Serbia, until 30 September...

World War I was the first war in which mass media and propaganda played a significant role in keeping the people at home informed on what occurred at...

Diplomatic history of World War I. Below is a table showing the outbreaks of wars between nations which occurred during World War I. Indicated are the dates...

Western Front was one of the main theatres of war during the First World War. Following the outbreak of war in August 1914, the German Army opened the Western...

Opposition to World War I was widespread during the conflict and included socialists, anarchists, syndicalists and Marxists as well as Christian pacifists...

During World War I and World War II, Switzerland maintained armed neutrality, and was not invaded by its neighbors, in part because of its topography...

one of the Central Powers of World War I, allied with the German Empire, Austria-Hungary, and Bulgaria. It entered the war on 29 October 1914 with a small...

World War (28 July 1914 – 11 November 1918) who lived to 1999 or later, along with the last known veterans for countries that participated in the war...

The artillery of World War I, improved over that used in previous wars, influenced the tactics, operations, and strategies that were used by the belligerents...

Apologize for the System of Military Sexual Slavery Before and During World War I Archived 9 May 2021 at the Wayback Machine "Passage of H.Res. 121 on...

of Canada during World War I began on August 4, 1914, when the United Kingdom entered the First World War (1914–1918) by declaring war on Germany. The...