And beyond through the end of the war. He also advocated the US of weaponized anthrax.
Yet the Nazis didn't plan to use it against the Allies during an invasion in 1944 despite national survival being at stake, much more so than a British defeat in 1940.
He didn't, he kept pushing for its use as well as anthrax throughout the rest of the war, but was voted down by the rest of the military establishment. He wanted to but was prevented from doing so by the saner members of the government. Again all in the book with some copies of actual documents of the plans for use in the book "A Higher Form of Killing"
A Higher Form of Killing: The Secret History of Chemica…
www.goodreads.com