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...
World War 1
Worldwar1.com: Trenches on the Web: The Second Battle of Ypres, April 1915
Freshly trained Canadian troops arrived at a quiet front on April 17, 1915. Five days later the Germans attacked with 5700 cylinders of chlorine gas and heavy artillery bombardment.
Ibis Communications
Eye Witness to History: Gas Attack, 1916
This article provides a description of what a poison gas attack was like.
BBC
Bbc History: World Wars: World War One: Daily Mirror Headlines: Ypres
Collection of excerpted headlines and news reports published in the "Daily Mirror" on April 23 and 24, 1915, relates events of the fighting at Ypres, including the German use of poison gas.
The History Cat
The History Cat: Stalemate on the Western Front
Summarizes the military efforts of the British and the Germans to defeat the enemy early in the war, which resulted in lengthy trench warfare along the Western Front. This led to the use of poisonous gases by each side, with deadly...