Re: Should gas have been used in the Pacific?
A really tough call PS.
As you say, it probably would've been effective. And if I were a Marine on Iwo, or if I had a son that was, at the time I probably would've said yes.
However, poison gas was outlawed internationally after WWI....and at the time of WWII, we were a nation that followed the International Laws of Warfare.
Also, pragmatically speaking, we, at the time thought that we were going to have to invade Japan.....what would have stopped the Japs from using poison gas against us during the invasion and warfare on the Japanese main islands?
We fought an honorable war, and we won honorably. It caused us a lot of causualties......but we won fair and square.
From the perspective of today, where the present administration doesn't feel it has to follow any rules.....I agree with FDR.