Mare Nostrum, how do I finish?
 

Playing with the mega mod, Open Horizons II

I finished.

Siege of Tubruk
Delivers for Maltra
Middle east supplies
Breakthrough Gibralter

Now all I have left is Mare Nostrum with the 10 crosses, I have 9 of the 10 filled.

Its August 27th 1941, I've gone back to base a couple times, and had to start with no mission selected because... there is none.

So how do I finish this thing?

thanks