Couple of questions:
1) which is the East map edge?
2) can the game go longer than 8 turns?
As Russ said, the East map edge is the one with the woods.
Yes, there's no time limit on the game-- no need to track individual turns at all (though at the end of each Allied Player Turn, there's going to be something going on with the Retreat & Return Track until the Lithuanians return).