World War 1
Worldwar1.com: Trenches on the Web: Armory: Gas Warfare
Detailed information on the use of chemicals as weapons during WWI. Includes images of soldiers wearing gas masks, an extensive list of chemicals and their effects, and links to further information on the Second Battle of Ypres and to...
Veterans Affairs Canada
Veteran Affairs Canada: Ypres 1915
In April 1915, Canadian troops were moved to the French city of Ypres where they were victims to a new weapon of gas attacks. This site outlines the Canadian experience at Ypres.