Answer:
Soldiers fight it but never changes.
It is in every mountain, it's not in any hill, it's not in all the world, and yet it's in the mill.
What ends in E, starts with E and has a letter inside it?
A gentleman whose offspring have successfully produced offspring of their own.
Men in skirts blow into these.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?