What the heck happened in my game when in 1050AD suddenly most of my Open Borders were closed??
What did I do inadvertently? How did I close multiple OBs?
I had just been interacting with AIs and trading maps and Alt-Tabbing out of Civ. Almost like each map trade also got a closed border.
It seemed like when I came back from an Alt-Tab the borders were closed.
Is there some Alt Key combination that could have done this?
