The following outline is provided as an overview of and topical guide to World War I: World War I – major war centred in Europe that began on 28 July...

The following outline is provided as an overview of and topical guide to World War II: World War II, or the Second World War was a global military conflict...

The following outline is provided as an overview of and topical guide to the Russo-Ukrainian War: Russo-Ukrainian War – ongoing international conflict...

The following outline is provided as an overview of and topical guide to war: War – organised and often prolonged armed conflict that is carried out by...

This is a list of the last known surviving veterans of the First World War (28 July 1914 – 11 November 1918) who lived to 1999 or later, along with the...

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

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

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...

Lists of World War I topics List of military engagements of World War I Outline of World War I World war World War II Freemasonry during World War I List...

This list of military engagements of World War I covers terrestrial, maritime, and aerial conflicts, including campaigns, operations, defensive positions...

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 1994...

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...

World War I is remembered and commemorated by various war memorials, including civic memorials, larger national monuments, war cemeteries, private memorials...

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 major European powers were...

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 Eastern Front or Eastern Theater of World War I  was a theater of operations that encompassed at its greatest extent the entire frontier between Russia...

The United States entered into World War I on 6 April 1917, more than two and a half years after the war began in Europe. Apart from an Anglophile element...

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...

The use of toxic chemicals as weapons dates back thousands of years, but the first large-scale use of chemical weapons was during World War I. They were...

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

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...

aftermath of World War I and the rise of fascism in Europe and militarism in Japan. Key events leading up to the war included Japan's invasion of Manchuria...

of World War I were the political and military figures that fought for or supported the Allied Powers during World War I. Nicholas II – Last Tsar of Russia...

The First World War generated population displacements of an unprecedented scale, of more than 12,000,000 civilians, (later exceeded by those of the Second...

conflicts that occurred during the first half of the 20th century, World War I (1914–1918) and World War II (1939–1945), although some historians have...

The following outline is provided as an overview of and topical guide to the Vietnam War: Vietnam War – Cold War-era proxy war that occurred in Vietnam...

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 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...

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...

held in prisoner-of-war camps during World War I. All nations pledged to follow the Hague Conventions on fair treatment of prisoners of war, and the survival...