“In April of 1915, Allied forces were battling the German Army for control of Ypres, a Flemish town in western Belgium. Months before, fighting with many young and untested soldiers, the Germans had taken heavy casualties there in a battle they called the Massacre of the Innocents of Ypres. This time, they were determined to launch their first major attack on the Western Front. With thousands of French, British, Belgian and Canadian forces dug in around the town, the Germans turned to Fritz Haber.
In 1918, Haber would be awarded the Nobel Prize in chemistry for his work in developing a method of synthesizing ammonia from nitrogen in the air—the process that enabled the production of fertilizer in quantities that revolutionized agriculture worldwide. But in the winter of 1915, Haber’s thoughts turned to annihilating the Allies. For his efforts directing a team of scientists on the front lines in World War I, he would become known as the father of chemical warfare.”