There they battled up Iwo Jima's hill,
Two hundred and fifty men
But only twenty-seven lived to walk back down again
And when the fight was over
And when Old Glory raised
Among the men who held it high
Was the Indian, Ira Hayes
The Marines who walked to the top of Suribachi sustained NO casualties. There was NO battle to get to the top of Suribachi.
I believe you are referring to the Ira Hayes statement that he did not consider himself a hero since 250 of his fellow marines landed on Iwo Jima and 27 walked off - over a 36 day period.
Essayons