do I mix the nation cards and nation 2 cards together?
the rules I didn't see anything on nation 2 cards.
The new edition has both Nations 1 and 2 cards in the box. You can mix them or hand pick them it doesn't matter. They have different backs so you may have to blind pick under the table or something. Again, it's not that important. They are just variable starting powers. Use whatever method works for your game group.