Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
chemical weapon
Table of Contents
References & Edit History Related Topics
Images & Videos
chemical weapons in World War I
The horrifying history of gas warfare
gas masks at the Second Battle of Ypres World War I machine gun crew trench warfare mustard gas in World War I U.S. wartime use of defoliant in Vietnam chemical weapons in World War I chemical weapons casualties chemical weapons in World War I
For Students
chemical warfare summary
Related Questions
Read Next
German machine gunners occupy a trench during World War I.
Weapons of World War I
British troops in a trench on the Western front during World War I. One officer takes reports of the fighting over a field telephone while the officer on the left jots it down and issues new orders.
Life in the Trenches: A World War I Photo Gallery
Vietnam War. Operation Georgia. U.S. Marines bombing bunkers and tunnels used by the Viet Cong. May 6, 1966
9 Questions About the Vietnam War Answered
Discover
Mona Lisa, oil on wood panel by Leonardo da Vinci, c. 1503-06; in the Louvre, Paris, France. 77 x 53 cm.
Why Is the Mona Lisa So Famous?
Marriage. A couple getting married during a church wedding ceremony. (religion, ceremony, bride, groom)
The Seven Sacraments of the Roman Catholic church
Statue of Nostradamus
Nostradamus and His Prophecies
Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics
10 Best Hockey Players of All Time
Agnes with a lamb near her feet. St. Agnes (Saint Agnes) design drawing for stained glass window by J&R Lamb Studios, ink, mount size 10.5 x 14.5 in.
Roman Catholic Saints
Candles Burning On Table In Church
What Is the Most Widely Practiced Religion in the World?
Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)
All 119 References in “We Didn’t Start the Fire,” Explained

chemical weapon: Related Content

verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Share
Share to social media
URL
https://www.britannica.com/facts/chemical-weapon
Written and fact-checked by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica

News •

Former chemistry student pleads guilty to chemical weapons charge • Apr. 23, 2025, 6:18 AM ET (BBC)

Photos and Videos

chemical weapons in World War I
gas masks at the Second Battle of Ypres
World War I machine gun crew
trench warfare
mustard gas in World War I
U.S. wartime use of defoliant in Vietnam
chemical weapons in World War I
chemical weapons casualties
chemical weapons in World War I
portable chemical, biological, and nuclear weapons shelter
The horrifying history of gas warfare
Observe English schoolchildren practicing using gas masks in case of a chemical attack amid World War II
See All Videos and Images →

Related Topics and References

Topics

Related Quizzes and Features

List
British troops in a trench on the Western front during World War I. One officer takes reports of the fighting over a field telephone while the officer on the left jots it down and issues new orders.
Life in the Trenches: A World War I Photo Gallery
German machine gunners occupy a trench during World War I.
Weapons of World War I