This is what I hope is at least topologically accurate map of the Second Commonweal, from Graydon Saunders's Commonweal books. This is not official in any way, and may contain many glaring errors and omissions.
Most of the symbols are from Field Manual 21-30, published in 1942 by the US Army.
Note also that it is canon that the Commonweal uses contour lines, whereas here I have used hacheur instead, since any height curves I would generate would be fully non-canon
This shows the strategic situation at the end of The March North, excepting only the presence of Wending which would have been destroyed at that time