Answer:
I start with āeā end with āeā. I have whole countries inside me. What am I?
Tear me off and scratch my head, what once was red is black instead. What am I?
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?