One of the deadliest conflicts in history, it resulted in an estimated 30 million military casualties, and 8 million civilian deaths from war-related causes and genocide. The movement of large …

Nov 17, 2025 · World War I, an international conflict that in 1914–18 embroiled most of the nations of Europe along with Russia, the United States, the Middle East, and other regions.

Oct 29, 2009 · World War I, also known as the Great War, started in 1914 after the assassination of Archduke Franz Ferdinand of Austria. His murder catapulted into a war across Europe that …

World War One (WW1) was a major global conflict that lasted four years, from 1914 to 1918. It began on 28 July 1914, when Austria-Hungary declared war on Serbia one month to the day …

A truly global conflict that began in 1914, World War I was a devastating war that caused over 38 million civilian and military casualties. The war would last until 1918 and involved all of the …

Only when the world went to war again in the 1930s and ’40s did the earlier conflict become known as the First World War. Its casualty totals were unprecedented, soaring into the …

World War I changed everything, including how humanity expressed itself through the culture and arts of the time. Learn why veterans of WWI, in a racially integrated movement, marched on …

World War I—also known as the Great War—pitted Germany, Austria-Hungary and the Ottoman Empire against Great Britain, the United States, France, Russia, Italy and Japan. New military...

Four great empires—the Hohenzollern, the Habsburg, the Romanov, and the Ottoman —fell, and the intercontinental movement of troops helped fuel the deadliest influenza pandemic in history.

Explore the comprehensive, peer-reviewed "1914-1918-online" encyclopedia. Access 1,600+ articles on WWI from global experts.