Deleted member 1487
Unless the Allies discover nerve agents ITTL they are in for a very rude surprise come 1940 and on. They probably will get there too eventually, especially if they are able to capture any German weapons and analyze them. The Eastern Front is going to be an even bigger nightmare than IOTL, though with the Soviets lacking the ability to make more than mustard gas will hurt them. Still they will have a pretty damn large stockpile of area denial weapons, which their artillery doctrine will absolutely mesh well with. Defenders will really have a hard time given that they can and will face weapons that will make fixed defenses uninhabitable extremely quickly or outright death traps in the face of nerve agents. City fighting is going to get a lot easier for an attacker and become a nightmare for civilians and defenders. Assuming butterflies don't change the outcome of fighting up to 1941 place like Leningrad, Stalingrad, and even just pocket battles are going to face quick liquidation in the face of the ultra persistent mustard gas the Germans had as well as Tabun, but the latter wasn't in mass production until 1942 as I recall. Since in 1941 the provision of equipment wasn't exactly the greatest on the Soviet side even WW1 agents like mustard gas are going to probably be used against troops that don't have sufficient access to gas masks and other protective equipment, which really doesn't bode well for their troops. But when the Soviets can mass artillery they will certainly get revenge by the mass use for their own mustard gas...which ironically would be made on equipment provided to them in the 1920s by the Reichswehr/IG Farben as part of their previous military cooperation.
The moral of the story is WW2 ITTL would make OTL look sane by comparison.
The moral of the story is WW2 ITTL would make OTL look sane by comparison.