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Allies of World War I
The Allies, the Entente or the Triple Entente was an international military coalition of countries led by France, the United Kingdom, Russia, the United States, Italy, and Japan against the Central Powers of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria in World War I.
World War I casualties
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 23 million wounded military personnel, ranking it among the deadliest conflicts in human history.
Causes of World War I
The identification of the causes of World War I remains a debated issue.
Timeline of World War I
This is a list of the events of World War I in chronological order.
United States in World War I
The United States declared war on Germany on April 6, 1917, nearly three years after World War I started.
Aftermath of World War I
{{Infobox historical event
Chemical weapons in World War I
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.
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