Fullmetal Alchemist Vol. 17 (manga)

A homunculus manages to breach impenetrable Fort Briggs, and the Elric brothers discover a terrible alchemical secret that pervades every corner of the world as they know it! Meanwhile, Major Kimblee and a ruthless General Raven make Major General Olivier Mira Armstrong an offer she can't refuse... Whose side is she on, really? And how far is she willing to go?