WI bio weapons used on Saipan in 1944?

In 1944, Japan was supposed to have launched a sub with bio-weapons ( Plague carrying fleas basically) toward Saipan but it got sunk en route. The Sub was carrying an assault team who would have deployed the plague fleas around U.S airfields on the island if all had went as planned.
What effect would this have on the War? Would the U.S respond with its own bio/chemical weapons if casualties had been high enough? Thoughts?
 
In 1944, Japan was supposed to have launched a sub with bio-weapons ( Plague carrying fleas basically) toward Saipan but it got sunk en route. The Sub was carrying an assault team who would have deployed the plague fleas around U.S airfields on the island if all had went as planned.
What effect would this have on the War? Would the U.S respond with its own bio/chemical weapons if casualties had been high enough? Thoughts?

Depends on successful this is, but in a word: nukes.
 
what some said "the only place they will speak japanese will be in hell" will become true. No mercy tactics, and the benevolent mcarthur shogunate will not happen
 

Geon

Donor
San Francisco

I don't know where I heard this, but wasn't there a similar plan in the works that was supposed to use the I series "aircraft carrier" submarines to deliver bio weapons via planes on the city of San Francisco?

Geon
 
What an absolutely perfect justification for the later use of atomic weapons. Truman could actually claim that the United States would have NEVER used such a weapon except against an enemy who had used biological weapons first.
 
What an absolutely perfect justification for the later use of atomic weapons. Truman could actually claim that the United States would have NEVER used such a weapon except against an enemy who had used biological weapons first.

This... Things go on pretty much as OTL, I can't imagine Saipan triggering a worse retribution from the US than things like the liberation of the Philippines (and discovering the death camps), nor would a 'successful' attack really embolden Japan to hold out beyond Hiroshima / Nagasaki / Soviet curbstomp in Manchuria. If the person who schemed up the bio-weapons attack isn't already dead, his head ends up on the chopping block next to Homma, Tojo and Yamashita.
 
What an absolutely perfect justification for the later use of atomic weapons. Truman could actually claim that the United States would have NEVER used such a weapon except against an enemy who had used biological weapons first.

And it occurs to me that Saipan, being an island, is easily isolated. The risk can be pretty well limited to American personnel already on the ground and, of course, the civilian population. It seems that such an attack by Japan would kill more Japanese civilians than anyone else.
 
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