The screenshot is attached: moving Beauregard from Loudon, VA to Frederick, MD will take (hold your breath now) 175 days.
I guess this were funny ... if Beauregard's corps weren't stuck!

As in, it takes more than 100 days for it to get to *any* other region. And it's a condition that has lasted for several turns, since I've seen it a few turns before as well (but hoped it would go away).
I have also made a save, if anyone is interested.
Second edit: This is not military control/loyalty-related. Going to the Virginia region below Loudon, VA (which is controlled by me) will take 120 days, according to the tooltip.