There must be either a battle in the sea zone, or an amphibious assault being launched from the sea zone.
My mistake was not sending my two move units to Romania the previous turn as Germany. I just played out turn 9 and US was able to stack Northern Italy. Italy is out of the game now, but on the other side of the board Japan is making 105, and he is bombing Russia with 5 bombers every turn. He has more than UK in the south and he can now start landing in Africa taking the money away from Russia and UK. I do agree that US is going to eventually take Germany, but could he do it before Moscow falls? Probably