Of course there were mistakes made prior to and during the battle for Iwo Jima. Every engagement known to man, in peace and in war, has had some kind of mistake, that in hind sight should have been prevented.
At the time, the capture of Iwo Jima was of great importance. With the luxury of 60 years of hind sight, the reasons to take Iwo Jima may seem a bit less critical. Regardless of what anyone now believes of the reasons to take Iwo Jima, I will ALWAYS hold those Marines and Sailors who did the fighting and dying at Iwo Jima in the HIGHEST regard.
Could've, Would've, and Should've. The 3 greatest foes ANY achievement ever faces.