This is probably in the rulebook but I'm too blind and/or stupid to find it. What if, due to bad luck and shitty use of Combat Cards, a side is left with no cards yet still has 1 or 2 action rounds left? Are you stuck with Auto 1ops and peace terms to choose from?
Be aware that your opponent will see if you're down to no cards. If you think this situation might come up then try to do the 1ops/peace terms early in the season.
Of course there's nothing wrong with finding yourself with a valuable card at the end of the season (perhaps an unusuable reinforcements, or the turkey awesome cc card) and taking 1ops instead of playing the valuable card.