The other border generals are preparing to flee Amestris, which is not good news. Mustang has already spread the plan of the homunculi within the army, and the iron-clad evidence is laid bare; the homunculi cannot deny it.
In the original work, Mustang and others didn't have it this easy, mainly because the intelligence gap was too wide; they didn't know about the plan or the background of the Little Man in the Bottle.
Logically, since the Little Man in the Bottle established the country, it should have a firm grasp over it. However, its aim is too inhumane, intending to sacrifice the nation's citizens, putting it at odds with everyone.
In the past century, the Little Man in the Bottle's actions have grown increasingly extreme, its fangs gradually revealed, with successive civil wars causing Amestris to trend toward collapse.
"You all move faster. I've already completely torn all decorum on my side, and I can't stay in the center any longer."