From what I know, Hitler wanted Germans to fight, quite literally, to the last, and he wouldn't have minded terribly if every last German died fighting the enemy.

So why did he never use poison gas in combat, especially in the closing months of the war? It seems like this would have at least significantly slowed down the Russian onslaught.

Even Churchill, it is said, was prepared to use poison gas had the Germans landed in Britain earlier in the war.

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    According to Hermann Goering, the main reason was "the Wehrmacht was dependent upon horse-drawn transport to move supplies to their combat units, and had never been able to devise a gas mask horses could tolerate" - See: en.wikipedia.org/wiki/Chemical_warfare#Nazi_Germany
    – yannis
    Oct 9, 2014 at 14:35
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    Could the down-voter please suggest what is wrong/poor with my question, so that I can try to improve it?
    – user3521
    Oct 9, 2014 at 15:31
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    Upvoting to offset the downvote. I think this is a legitimate question, and one that many others (including myself) would be interested to hear some details about. If the comment by @YannisRizos is the full story, it should be added as an answer and accepted, but either way this isn't a bad line of discussion.
    – Nerrolken
    Oct 9, 2014 at 17:58
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    @YannisRizos I agree, and I hope someone can provide a more detailed and researched answer, but sometimes there isn't as much information available on historical topics as we'd like. If the horse issue is the final word, and no other information is available, then the answer to the question would be "all we know is this." It wouldn't be fully satisfying, but if that's all the info we have, then that's the answer to the question. Either way, my main point was that the question was worth asking in the first place.
    – Nerrolken
    Oct 9, 2014 at 18:09
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    Could you rephrase the title to include a reference to warfare - the way it is written it is really irritating (the Nazis used quite a lot of poison gas, although not on the battlefield). I think that might have caused the downvotes (I upvoted to offset another downvote).
    – user3769
    Oct 10, 2014 at 7:36

8 Answers 8


Re: Pierstorff's explanation, I haven't heard the biological weapons explanation before. As the primary motivation for Hitler's restraint, I don't think it's correct. From my understanding, bio weapons were rather primitive on all sides and the Japanese were actually the most advanced in this regard, not the Allies.

[EDIT: I'm not sure where I first heard all of this, but here's a confirming source that I do trust--Derek Lowe of In the Pipeline ]

I'm really surprised no one has mentioned tabun yet. This nerve agent was the first ever produced, the forerunner of sarin and VX. Hitler made a lot of it, and the Allies weren't even aware of nerve gases until they captured some tabun from the Germans fairly late in the war. The Germans could have wreaked real havoc if they had used it at a critical juncture. With an effective delivery system, they might have been able to turn back Operation Overlord (D-Day), prolonging the war for god knows how long. (Nerve gas tends to be much more effective than other gases, especially if the enemy doesn't know what the hell it is.)

Here's the punch line: the reason why Hitler didn't use any gas (tabun included) was because his advisers thought the Allies had tabun as well. Apparently all of the prerequisite chemical work had been done by American scientists and were published in ordinary academic journals years before (the discovery of tabun was a natural consequence of pesticide R&D.) They just assumed that the Allied military had taken note of the research and prevented further publication in order to use it as a secret weapon if Germany used gas first. In reality, Allied military scientists had completely overlooked it.

So, fearing the Allies' hefty air power could saturate German cities with tabun at a moment's notice, Hitler refrained from using any gas. I think this is a fascinating example of MAD functioning many years before the phrase entered common usage re: nuclear war... with the added twist that the threat from the other side was entirely imaginary.

It also seems to be an unusual example of Hitler showing fear, sensibility, and/or restraint.

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    Nice answer. By the way, you might want to replace the we used in your answer for a more impersonal term like the allies or anything similar. May 8, 2015 at 10:23
  • This should be the accepted answer. Nov 1, 2015 at 19:41
  • I don't know if this is the real reason, but it's a very interesting theory
    – sangil
    Feb 28, 2016 at 13:35
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    Going the right direction, but missing slightly. The threat of Allied retaliation was not "entirely imaginary". The Allies might not have had nerve gasses, but they certainly had poison gas. So retaliation with phosgene, mustard gas, chlorine etc. was a distinct possibility, and refraining from escalating to chemical warfare a quite valid, not misguided, decision.
    – DevSolar
    Sep 15, 2016 at 8:59
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    Had the nazis used nerve gas and managed to prolong the war then it would have been a German city that saw the first a-bomb, perhaps.
    – Jeff
    Mar 2, 2017 at 1:16

In 1989 Rudibert Kunz (a journalist known for his work about chemical warfare) and military historian Rolf-Dieter Müller published an article about this question in the german newspaper Die Zeit (the article is available online). I found this via Google and was a bit surprised.

Like many people I had believed in the story that Hitler did not want to use gas because of his own trauma in the first world war (he was injured in a gas attack and temporarily blinded). It seems that this what not the case and that in fact Germany had produced large quantities of gas to be used to some extent against Great Britain, but mostly on the eastern front.

According to the article the use of gas against Britain was hampered by the fact that by the time chemical weapons where available in large quantities there was no way to deliver them (the A4 rockets had not enough payload for a large scale attack and planes could by that time not easily operate above british soil).

But apparently what really stopped the german plans was the fact that the allied forces had upped the ante by developing biological weapons which where (supposedly at least) much more deadly than mere poison gas. Germany had no big programs to develop biological weapons since Hitler did not believe they had enough potential to be useful (as I understand the article this had no deeper reason and was simply a misjudgment on his part. Apparently some Nazis underlings had run small developement progamms in concentration camps but (rather luckily) could not convince Hitler to allow large scale production). By the time the full potential/danger of biological weapons was recognized it was too late to catch up.

So the authors conclude that the Nazis did not use chemical warfare because the allies could issue a plausible threat to retaliate with much more deadly and uncontainable biologicals weapons (with the aim to wipe out lifestock and crops so that , by the quaint logic of some allied generals, they did not violate the Geneva protocol which protected human life only).

(edited to add) I realize that this does not quite answer your question, but it's the only thing on the topic I could find that was written by actual experts. And the article gives the impression that Hitler was not in a position to order a gas attack at the end of the war since none of his own military staff would have supported him (presumably even an absolute dictator needs someone to carry out his orders).

I'm not expert on this and just retell what I have just read. And of course the Nazis used a lot of poison gas, just not on the battlefield.

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    just the threat of the allies retaliating in kind with chemical weapons (remember they had bombers flying almost at will over the Reich at the time) was enough. I'm not sure the Germans were aware of the British and American biological warfare plans (and don't forget the Soviets, though I'm not 100% sure they had a viable weaponised agent during WW2, would have to dig deep in my books about that).
    – jwenting
    Oct 13, 2014 at 2:28
  • Then why don't you hold your comments until you have done the digging ? I have no stakes in the theory quoted above, but it is at least sourced by an article by experts in the field. F they are wrong (and the claim surely sounds sensational) better evidence than just your memory would be helpful.
    – user3769
    Oct 13, 2014 at 5:13
  • Did Geneva protocol forbid biological weapons?
    – Anixx
    Sep 14, 2016 at 17:02
  • @Anixx The convention on biological weapons didn't come into effect until much later, and AFAIK was not signed and ratified by any country having them at the time except the USSR and USA (with the USA destroying their stockpiles while the USSR hid their own and corrupted any inspection efforts, in fact Russia does so to this date).
    – jwenting
    Sep 14, 2016 at 19:49

In World War I all nations learned that poison gas basically added nothing to military actions, not even higher casualties once everyone got out their masks and protective gear. Artillery did better at inflicting damage just shooting high explosive shells.

In between the wars use of gas was banned, and most nations complied.

In World War II, every nation had plenty of stocks of gas to retaliate with and protective gear to issue if the other side started using banned weapons. This would make starting the use of gas a momentary advantage only. Also long range bombers meant that retaliation might strike deep to rear area installations or even homeland cities. So risks were much higher and the possible reward still close to zero.

There was an incident at Bari where some US gas stocks were released when a German raider attacked the ship and docks carrying it into Italy, for use if the protocols broke down.

  • the main threat of chemical weapons in WW2 was their use against civilian population centers, not troops in the field. It might have been successful against troops marshaling for an attack, but try to reach those (the V2 might have served for that, had it been more accurate and less prone to explode over its launch area).
    – jwenting
    Oct 14, 2014 at 8:21

England and the Soviet Union had huge stockpiles of chemical weapons. There was a joint statement from Stalin and Churchill essentially confirming that they would observe the convention prohibiting them, unless Germany used them first. If Germany did use them, they promised to drown its cities in iprite. :-) The Soviets did not have the technical capability to do this in the early stages, but England did.

This information is taken from collected correspondence between Stalin and Churchill during World War 2, which I have in Russian. I can search for the date of the letter mentioning this joint statement if anyone is interested. I do not know whether this correspondence was ever published in English.

EDIT. There can be a completely different reason as well: chemical weapons are not very effective on the battlefield. The example of WWI shows this. Perhaps this explains why they were prohibited: nobody cared much about them.

  • i've seen this argued before but never understood how this squares with every indication (e.g. the "Nero decree" germanhistorydocs.ghi-dc.org/sub_document.cfm?document_id=1590) that Hitler and many leading nazis by 1944/5 cared not a jot whether Germany and all Germans were destroyed at the end May 9, 2015 at 13:09
  • @Tea Drinker: The documents you refer to are of 1944/5. The documents I refer to are of 1941/2. Hitler's attitude may had changed during this time.
    – Alex
    May 9, 2015 at 14:12

An article from the NY Times[1] adds some insight here. It basically says "no one knows"! Contrary to some of the posts in this thread, the article cites military sources saying that use of nerve gas could have been a very effective battlefield weapon in WWII. The article mentions Hitler's personal experience with gas during WWI, fear of retaliation, and lack of delivery mechanisms as possible factors. It also cites another possibility: deliberate misinformation from Hitler's own general in charge of chemical use, who had become disenchanted with Hitler's leadership. But the bottom line: It's still a mystery!

That's all I got! I suppose we should all thank Sean Spicer for resurrecting this question ;-)

[1]: Riddle of Why Hitler Didn’t Use Sarin Gas Remains Unsolved https://www.nytimes.com/2017/04/12/science/sean-spicer-hitler-sarin-chemical-weapons-world-war-ii.html?_r=0


My father told me that it was asked of Churchill if it was possible that the Nazis might use some form of what we call chemical warfare today. Churchill apparently responded, "Let them try!" and this was sufficient of a deterrent to give Hitler pause, and he didn't use this tactic.

  • I edited the question out of your answer; SE conventions discourage discussion in answers.
    – MCW
    Sep 14, 2016 at 17:57
  • Depending on when that episode supposedly took place, Churchill was probably either bluffing or indicated his trust in allied air power and air defenses to stop such an attack. The allies had no viable chemical weapons stockpiles except some WW1 era stocks of mustard and chlorine gas that would not have done much, firebombing had already been perfected to where it could annihillate an entire large city with no effective means of controlling the blaze.
    – jwenting
    Sep 14, 2016 at 19:55
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    This answer is pure speculation.
    – a20
    Jan 25, 2017 at 6:26

Using poison gas in warfare requires the user to wear a gas mask and a special suit. The Germans used blitzkrieg in WW2. The chemical suit would have slowed them up more than the allies.

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    You do realize Blitzkrieg is basically just a fancy name given to closely coordinated Air and Armour operations? I can't imagine how would it hamper the speed of the cavalry if the Tankies were wearing Chemical warfare gear.
    – NSNoob
    Apr 12, 2017 at 13:49

I'm in possession of original WW2 British documents concerning chemical warfare. Those papers mainly concern experiments conducted in Hendon, on decontamination, detection and so on. It appears that the British were quite unaware of German nerve gas. A secret note does mention captured German ammunition describing something that could have been Tabun. The chemical was not being identified, but described as a probable mustard like only more potent and affecting the lungs. I don't know if anyone would be interested with those documents but I'd be willing to send them to anyone with academic interests in them

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    While interesting, I don't think this answers the question.
    – MCW
    Jun 27, 2015 at 12:18
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    Could you scan, post and link to those documents? Without a source, this answer cannot be verified.
    – Schwern
    Nov 1, 2015 at 20:54