We left no battlefield monuments

From one to six miles up.

No memorial field to vie

As sites for future preservation.

No sky fixed points allowing us to say

This is where Ralph and Jimmy died, or 

That's where Ted was blown apart.

Decades of winds have cleansed the upper air,

Leaving nothing to show to coming generations.

But - if you were ever there, my friend -

You'll have no need for polished granite.

From the records of 150 Squadron - author unknown, can you advise further?