Under a forest canopy.
POP1
The debate between Roosevelt and Churchill on the subject of whether to use Nerve gas lasted throughout the war. Roosevelt was opposed, and in June 1943 he sharply reaffirmed United States policy on gas warfare: "Use of such weapons has been outlawed by the general opinion of civilized mankind. This country has not used them, and I hope we will never be compelled to use them. I state categorically that we shall under no circumstances resort to the use of such weapons unless they are first used by our enemies."
POP2
Nevertheless, in 1942 the Army's Chemical Warfare Service (CWS) received one billion dollars and had more then sixty thousand employees. Its tasks included preparing for gas and bacteriological warfare, as well as producing incendiaries for bombing, flame throwers, and other devices.
POP3
In December 1943, after the bloody Battle of Tarawa, which had cost the United States more than thirty-four hundred casualties in four days, the chief of the CWS pleaded with Army superiors to start using gas. He argued that in view of american air superiority, there would be no danger of reprisals.
There was some popular support for this view. The New York Daily News declared , "We should gas Japan". The Washington Times Herald asserted, "We should have used gas at Tarawa" because "You can cook 'em better with gas". But this was a minority opinion. About 75 percent of Americans still opposed initiating gas weapons.
It was on military grounds, not moral, that the Army decided against their use. The argument that won favor was that this was a two-theater war, and the use of gas against Japan might provoke Germany "To gas in retaliation."
POP4
About a week after D-day, Germany launched a massive V-1 rocket assault on Britain, killing twenty-seven hundred people, injuring ten thousand, and damaging the homes of more than two hundred thousand. Eager to punish Germany and hoping likewise to deter future rocket attacks, Churchill wanted to "drench the cities of the Ruhr and many other cities in Germany (with gas) so that most of the population would be in constant need of medical attention".
Churchill informed his military advisers: "It is absurd to consider morality on this topic when everybody used it in the last war without a word of complaint from the moralists or the Church. On the other hand, in the last war the bombing of open cities was regarded as forbidden. Now everybody does it as a matter of course. It is simply a question of fashion changing as she does between long and short skirts for women."
But not yet quite ready to cross what many considered a moral threshold, he qualified his statement indicating that he would use gas only if "it (is) life or death for us, or (if) it would shorten the war by a year."
Note on the Battle of Tarawa: There were between 10,000 and 12,000 casualties out of 160,000 troops landed on the Normandy beaches on D-Day,
He directed his military advisors to come up with a "cold-blooded calculation as to how it would pay us to use poison gas...I want the matter studied in cold blood by sensible people and not by that particular set psalm-singing uniformed defeatists which one runs across now here now there'
Disappointingly for Churchill, his advisors argued that aircraft would be diverted from their more effective utilization in bombing Germany's industries and cities.
POP5
In 1945 as the war in Europe was winding down, General Marshall, the Army Chief of Staff, wanted to initiate gas warfare against Japan. British opposition prevented him. It was feared that Germany, involved now in the last few weeks of the war, might be tempted to resort to gas in Europe.
POP6
After the War, it was revealed that the United States had produced 135,000 tons of chemical warfare agents, Germany about 70,000 tons, Britain 40,000 tons, and Japan had 7,500 tons.
From the American Heritage Magazine.