you left us last time with the map completed and the forces massed. Next I needed to work out the diplomacy. This was simple. There are 8 levels of diplomatic relations from 1 - Allies to 8 - War. I simply rolled for these on a D8
I have added the Pope, seems like an important chap, and I randomly gave him a Nationality, Bolognese. Whilst not taking an active roll in the fighting the Papal States will influence how others see each other. Diplomatic status changes each turn based on a D6 roll (1,2 improve, 3,4 remain same and 5,6 worsen) with some factors based on current status.
Generally all the sides stated at peace but Milan and Bologna were a war and Genoa and Bologna were Allies.
Being at war the strong Milan immediately attacked Bologna and Bologna moved to intercept.