Answer:
Soldiers line up spaced with pride. Two long rows lined side by side. One sole unit can decide, if the rows will unite or divide.
My first is an insect; my second is a border; my whole puts the face in a tuneful disorder.
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
Autumn leaves and bad bowlers wreak havoc on this
Tall in the morning, short at noon, gone at night. But I'll be back soon.
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.