Answer:
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-legged am I. Name me and see me at home in the sky.
What relies on columns but isn't a house, and asks for help but can't speak itself?
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
They can float and tickle, but their sound is rarely heard unless you're a pillow or bird. What are they?
What instrument can make any sound and be heart, but not touched or seen?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.