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What Was World War I?

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This compelling addition to the What Was? series covers what was supposed to be “the war to end all wars” but tragically wasn't.

In 1914, the assassination of an Austrian archduke set off a disastrous four-year-long conflict involving dozens of countries with battles taking place in all parts of the world. World War I was the first to use planes and tanks as well as deadly gases that left soldiers blinded or “shell shocked” (a condition now called Post Traumatic Stress Syndrome). There were battles that lasted for months with opposing troops fighting from rat-infested trenches, battles that often ended in a hollow victory with only a small area of land retaken. The author of many successful Who HQ titles Nico Medina gives young readers a clear and compelling account of this long and tragic event, a war that left over 20 million dead and was the lead-up to World War II barely twenty years later.

112 pages, Kindle Edition

Published June 6, 2023

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Nico Medina

30 books25 followers

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5 stars
132 (44%)
4 stars
120 (40%)
3 stars
43 (14%)
2 stars
2 (<1%)
1 star
2 (<1%)
Displaying 1 - 30 of 33 reviews
Profile Image for Daniel Ray.
690 reviews16 followers
November 18, 2025
A refresher of the war…. And I didn’t know this but the war helped women suffrage since they served on the front lines as nurses and filled many empty men’s jobs in the US. The 19th Amendment guaranteeing (white) women the right to vote passed 2 years after the war ended. An amendment takes 2/3rds of Congress and 3/4ths of the states.
Profile Image for Shelley.
173 reviews
January 17, 2024
Read this out loud with my second grader! Very informative with safe, easy to understand verbiage.
163 reviews13 followers
June 6, 2025
I learned...
3 of the countries' leaders were first cousins! King George V of Britain was first cousins on different sides with both Kaiser Wilhelm II of Germany (their grandma was Queen Victoria) and Tsar Nicholas II of Russia (their Grandpa was the King of Denmark).
Some Austria-Hungarian leaders were looking for an excuse to go to war against Serbia to assert their dominance, and the assassination of Archduke Ferdinand provided the opportunity.
Archduke Ferdinand was aware of angry sentiment toward him because of the timing of his trip coinciding with a nationalist holiday. Also there was an attack on his motorcade that got the car behind him. But despite the warnings, he still continued on with the trip. He was finally attempting to leave but the driver didn't speak the language and took a wrong turn, and the couple were killed on that street.
The United States entered the war after Germany 1) reneged on its promise not to sink passenger ships and 2) wrote a telegram to the ambassador in Mexico asking them to go to war against America.
Soldiers weren't permanently stationed in the trenches at the front: they rotated every week or so.
Profile Image for Goddess of Chaos.
2,897 reviews12 followers
July 7, 2023
"Some called it the War to End All Wars, which sadly it wasn’t."

This book not only does a good job of explaining how World War I became a WORLD war, and how many countries were involved, but it also explores how it played in to World War II...it also notes how the war was fought, with Zepplins dropping bombs in Blitz like runs across the channel, notes how planes were used, again helping us to see the evolution of the tools the military and those fighting use.

It's awesome to note how many were injured and died in the trenches, when poison gasses were used... making me grateful we don't often hear such large/horrific numbers in modern times.
Profile Image for Tegan.
1,150 reviews95 followers
October 10, 2023
A concise history and a good starting point for young readers. With the amount of information that needed to be shared, it felt a bit rushed and could be overwhelming/choppy. But given that the book is only 112 pages, that makes sense.
Profile Image for Alex.
6,803 reviews1 follower
May 15, 2024
I know a lot about WWII but very little about WWI, so I actually learned a lot from this book!
4 reviews
January 19, 2025
Quick read with a lot of interesting information
Profile Image for Alicia.
8,899 reviews161 followers
December 20, 2025
Always good for a short look at the history of a person or event, this Who HQ is about World War I that had other names before it became World War I when World War II came to life. The assassination of the duke (after almost being blown up a few hours before that) kicked off much of it and the book focuses quite a bit on the warfare itself (trench warfare including the Christmas Truce story with the medical issues the soldiers experienced like trench foot).

From the major players to several small events inside the larger war, it covers quite a bit of ground including women's contributions and the shifting territorial issues.
Profile Image for Chris.
647 reviews2 followers
December 24, 2023
After being halfway in my World War I class, my niece and I decided to read another addition of the What Was series. This was a great overview of how the war started, new wartime technology, a few key battles, and the ending of the war with the US supporting the Allies in the Great War! An addition to this book was a series of actual photos that helped give a clearer idea of trench warfare, battles at sea, and the devastation of towns like Verdun & Ypres. Great series for both young students and old students as they are learning world history.
Profile Image for David Rough.
Author 16 books12 followers
January 9, 2025
The dynamics of World War 1 are as confusing as a combined game of chess and checkers played at the same time on the same board. The causes of the war seemed to fall like dominoes. This concise history of the war, written for younger readers, does an admirable job of putting the pieces together in a logical order.

The book presents the war with pages on battles on the land (particularly the trenches of France), in the air (including the zeppelins and the Gotha bomber), and at sea (highlighting the German U-boats). Excellent illustrations.
Profile Image for Johnny Hiatt.
12 reviews
April 9, 2026
I realized that WWI and the Great Depression and WWII connected in their own ways. WWI started the chaos. Then the economy struggles after WWI, then crashes and makes everything worse. Then people turned to extreme leaders like Hitler and WWII begins.

Also I found an Easter egg in this book related to the Poppy Playtime arg! Flanders Fields is used as a password for a file in the arg, which also connects to poppy playtime because poppy’s grew in that field. The game developer must have been a history buff!
Profile Image for Kevin Koppelmann.
664 reviews1 follower
November 11, 2025
Short little book that was interesting. Not sure it covered all the aspects of what started the war but it did cover the technology advancements and how the USA changed its outlook on isolationism after this war.
Profile Image for Isaac.
328 reviews
June 30, 2023
"I liked it because it was about the war. I never knew about World War 1 until this book."
Profile Image for Amber.
262 reviews
August 2, 2023
Read as the non-fiction companion to "The Moffats" with my 3rd grader. He gave the 4 star rating ;)
Profile Image for John Dembowski.
66 reviews3 followers
September 25, 2023
Succinctly and clearly summarizes all the complicated aspects of this war for kids, including the ramifications to the rest of world history.
Profile Image for Curtis.
19 reviews1 follower
February 16, 2024
It has crucial facts about the beginning and the ending of WWI. It took me “3 minutes” to read.
Profile Image for Emily.
514 reviews
March 19, 2024
I learned a great deal from reading this book. It amazes me how things went down and then looking back, how everything turned out. It was a truly difficult time all around the world.
Profile Image for Nancy.
850 reviews6 followers
June 27, 2024
What Was World War I is the best summary of WWI I've come across.

Highly recommended.
Profile Image for Cindy.
99 reviews1 follower
September 26, 2024
Another easy read full of historical information that I think my grandchildren will enjoy and learn from.
Profile Image for Callumhopper.
79 reviews1 follower
October 1, 2024
I was reading another Ww1 history book at the same time and I think it was a very good review on the great war for ages 7-11 bit to short for my taste but very good.
Profile Image for Lauren M.
450 reviews1 follower
December 16, 2024
A wonderful, comprehensive history of World War I!

Great for kids learning about this war for the first time and adults who may need a refresher!
Profile Image for Emma.
4,971 reviews13 followers
June 23, 2025
It's crazy how such a small event in a small country could start a war.
Profile Image for Lindsey.
184 reviews
August 17, 2025
I love these books to listen to with the kids to give a brief overview of different historical events.
Profile Image for Evan.
23 reviews
July 3, 2023
I enjoyed this a lot. In a way ive always know about a lot of this because of star wars and old tv shows. But i did learn a lot of new things! My favorite part was when it was Christmas and both sides on the battle field celebrated together, it was just really strange.
Displaying 1 - 30 of 33 reviews