when was ww

World War I, often the subject of "when was ww" queries, ran from July 28, 1914, to November 11, 1918.

This global conflict reshaped the 20th century, pitting the Allies against the Central Powers in brutal trench warfare across Europe, the Middle East, and beyond.

Key Dates

• Start : Austria-Hungary declared war on Serbia after the assassination of Archduke Franz Ferdinand on June 28, 1914, sparking a chain reaction.

• U.S. Entry : America joined the Allies in April 1917, shifting the tide.

• End : The Armistice of Compiègne halted fighting on November 11, 1918, at 11 a.m., leading to the Treaty of Versailles in 1919.

Major Belligerents

Side| Key Nations
---|---
Allies| France, Great Britain, Russia (until 1917), United States (from 1917), Italy (from 1915), Japan 3
Central Powers| Germany, Austria-Hungary, Ottoman Empire, Bulgaria 3

The war introduced tanks, chemical weapons, and aircraft, causing over 16 million deaths and setting the stage for World War II.

Why People Ask "When Was WW"

Folks often shorthand it this way in quick searches or forums, blending curiosity about history's deadliest pre-WWII clash with modern reminders like Veterans Day. No major new "WW" events trending now—it's pure historical interest.

TL;DR : WW1: 1914-1918, a four-year slaughter that redrew maps and birthed modern warfare.

Information gathered from public forums or data available on the internet and portrayed here.