Forces of Nature-Edit

[TranquillityBase]

tight rope army
defend between the lines, 
raid reflections-
guard your marching mirrors.

steel soldiers
breech the eastern barricade     I think you mean "breach"
divine division-                 see below
fail to fly, fall into fire
prevail in blinded battle.

Just a note to say I like your edit.  One note: "divine division"; since the poem has a lot of military imagery, some readers might interpret "division" as the term used for a military formation.  In your original, it was about duality, so "divine duality" might be better, if that's what you are meaning to say.