By: Elizabeth Nix

Were They Always Called ‘World War I’ and ‘World War II’?

HISTORY: World War I Battles, WWI Timeline

Lt. E Brooks/Imperial War Museums via Getty Images

Published: March 06, 2013

Last Updated: January 31, 2025

The short answer is no, though it’s hard to pinpoint precisely when the World War I and World War II—or First World War and Second World War—monikers arose. During World War I, of course, nobody knew that a second global conflict would follow closely on the heels of the first, so there was no need to distinguish it as the first of its kind.

After initially referring to the “European War,” U.S. newspapers adopted “World War” once America entered the confrontation in 1917. On the other side of the Atlantic, meanwhile, Britons preferred “Great War” until the 1940s—with the notable exception of Winston Churchill, who reminisced about the “World War” in the 1927 volume of his memoir The World Crisis.

“World War II,” on the other hand, first appeared in print all the way back in February 1919, when a Manchester Guardian article used the term much in the way people today predict a hypothetical “World War III.” But it was Franklin D. Roosevelt who in 1941 would publicly label the conflict the “Second World War,” and his fellow Americans quickly followed suit. (In Britain, it remained simply “the War” until the late 1940s.)

While Roosevelt may have helped popularize the name, it seems he wasn’t entirely satisfied with it. In 1942 he asked the public to propose alternate appellations, and over the next few weeks the War Department received 15,000 submissions ranging from “the War for Civilization” to “the War Against Enslavement.” Neither these nor Roosevelt’s own choice—“the Survival War”—had staying power. “World War II” and “Second World War” it was—and, as a result, “I” or “First” was appended to the clash that preceded it.

Stream World War II series and specials commercial-free in HISTORY Vault.

7-DAY FREE TRIAL

Commercial-free,

Cancel anytime

Stream Now

Exclusions & terms apply

Related Articles

How World War I Eclipsed 1918 Pandemic Memorials

Both World War I and the 1918 influenza pandemic were devastating events in history. So why did memorials for one event overshadow the other?

Some winged warriors, like the famed Cher Ami, received military honors for their intrepid feats as battlefield messengers.

A German U-boat, circa 1916.

After terrorizing trans-Atlantic ships in World War I, German U-boats grew even more fearsome in World War II.

Manfred von Richthofen—better known as the “Red Baron”—was the top scoring flying ace of World War I, with 80 aerial victories between September 1916 and his death in April 1918.

About the author

Fact Check

We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us! HISTORY reviews and updates its content regularly to ensure it is complete and accurate.

Citation Information

Article title
Were They Always Called ‘World War I’ and ‘World War II’?
Website Name
History
Date Accessed
April 29, 2025
Publisher
A&E Television Networks
Last Updated
January 31, 2025
Original Published Date
March 06, 2013

History Revealed

Sign up for "Inside History"

Get fascinating history stories twice a week that connect the past with today’s world, plus an in-depth exploration every Friday.

By submitting your information, you agree to receive emails from HISTORY and A+E Global Media. You can opt out at any time. You must be 16 years or older and a resident of the United States.

King Tut's gold mask