Paris Green
The mustard gas stockpile was enlarged in 1940-1941 to help repel a possible Nazi German invasion in 1940–1941, and had there been an invasion may have also deployed it against German cities. General Alan Brooke, in command of British anti-invasion preparations of World War II said that he "...had every intention of using sprayed mustard gas on the beaches" in an annotation in his diary. The British manufactured mustard, chlorine, lewisite, phosgene and Paris Green and stored it at airfields and depots for use on the beaches.